Added GPL header to all themes for which I can confirm are licensed GPL. Still waiting on confirmation for one of them.

rtdata/themes/ClearLooks (Dark Orange)

@@ -1,5 +1,25 @@
+#
+#   This file is part of RawTherapee.
+#
+#   Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
+#
+#   RawTherapee is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation, either version 3 of the License, or
+#   (at your option) any later version.
+#
+#   RawTherapee is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with RawTherapee.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+
 # Color scheme contributed by Franco Gotusso based on Clearlooks-DarkCoffee by Chibi
-# and edited by bvc as Clearlooks-DarkCoffee2
+# and edited by bvc as Clearlooks-DarkCoffee2.  Downloaded from http://art.gnome.org/themes/gtk2/1065
 
 style "clearlooks-default"
 {

rtdata/themes/Dark

@@ -1,3 +1,22 @@
+#
+#   This file is part of RawTherapee.
+#
+#   Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
+#
+#   RawTherapee is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation, either version 3 of the License, or
+#   (at your option) any later version.
+#
+#   RawTherapee is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with RawTherapee.  If not, see <http://www.gnu.org/licenses/>.
+#
+
 # colour scheme (RT Dark) by Bytec ( http://bytec.vitanet.lv )
 # based on the default gtkrc for
 # rawtherapee ( http://www.rawtherapee.com )

rtdata/themes/Default

@@ -1,3 +1,22 @@
+#
+#   This file is part of RawTherapee.
+#
+#   Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
+#
+#   RawTherapee is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation, either version 3 of the License, or
+#   (at your option) any later version.
+#
+#   RawTherapee is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with RawTherapee.  If not, see <http://www.gnu.org/licenses/>.
+#
+
 # colour scheme by Bytec ( http://bytec.vitanet.lv )
 # based on the default gtkrc for
 # rawtherapee ( http://www.rawtherapee.com )
@@ -148,4 +167,4 @@ widget "gtk-tooltip" style "clearlooks-tooltips"
 class "GtkNotebook" style "clearlooks-notebook"
 class "GtkProgressBar" style "clearlooks-progressbar"
 widget_class "*.GtkComboBox.GtkButton" style "clearlooks-combo"
-widget_class "*.GtkCombo.GtkButton" style "clearlooks-combo"
+widget_class "*.GtkCombo.GtkButton" style "clearlooks-combo"

rtdata/themes/Gray Textured

@@ -1,4 +1,25 @@
-# Textured gray theme.  Based off of GM Looks and Cillop Midnite
+#
+#   This file is part of RawTherapee.
+#
+#   Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
+#
+#   RawTherapee is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation, either version 3 of the License, or
+#   (at your option) any later version.
+#
+#   RawTherapee is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with RawTherapee.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+# Textured gray theme.  Based off of GM Looks (http://art.gnome.org/themes/gtk2/1163) and 
+# Cillop Midnite (http://art.gnome.org/themes/gtk2/1317), both of which are released under the GPL.
+# Modified by Wyatt Olson.
 
 # Sneaking through the code are we.? ;)
 style "clearlooks-default"
@@ -567,4 +588,4 @@ class "MetaFrames" style "metacity-frame"
 
 
 class "GtkScrollbar"       			style "scrollbar"
-class "GtkRange"         			style "range"
+class "GtkRange"         			style "range"

rtdata/themes/Light

@@ -1,3 +1,22 @@
+#
+#   This file is part of RawTherapee.
+#
+#   Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
+#
+#   RawTherapee is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation, either version 3 of the License, or
+#   (at your option) any later version.
+#
+#   RawTherapee is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with RawTherapee.  If not, see <http://www.gnu.org/licenses/>.
+#
+
 # Based on Bluecurve
 # Created by Richard Stellingwerff, Emil Jacobs and Daniel Borgmann.