Hello!
I'm kinda new to linux... But yet, I managed to do well and do stuff around with it... I had no problem, since I tried to install a GTK theme...
I first tried to hit the install theme button in Applications/settings/themes
but I noticed that it wasn't working
(my theme is a complete theme with a gtkrc file)
so I looked around on the web and found a guide that told me to edit the .gtkrc-1.2-gnome2 file in my personal folder. So I did. I changed the theme to "/usr/share/themes/BHgtk/gtk/gtkrc"
I saved the file and opened some prog around to see if it worked. Some of the progs I opened were using the theme, but some were not. Actually, The theme was like 50% used (only the content of some progs were using it and the window border was still the default one)
So I told to myself: "maybe I need to reboot so it could use all of it" and I did.
But when I came back the .gtkrc-1.2-gnome2 file was back to normal (default) ...
I tried again and every time I reboot it get back to default... I tried as a root, does the same...
So I ask here, to u guys, gods of unix :P how could I change my current theme to /usr/share/themes/BHgtk/gtk/gtkrc ?
thx!

If you're using gnome then just use the 'theme' setting in the gnome-control-center to set it. If not, then edit the file:

.gtkrc (in your home folder)
and have the line:
include "/usr/share/themes/Milk\ 2.0/gtk-2.0/gtkrc"
as the only thing in it. (note, Milk 2.0 is the theme I'm using...the \ is because the name contains a space). Also, that will only change the theme for programs using the old gtk 1.2. Most programs now use gtk 2.0 (or higher). You can change this in the file .gtkrc-2.0

My solution is simply to have .gtkrc-2.0 as a symlink to .gtkrc
You can even change the default font by also adding the line:
gtk-font-name "Runoff 14"
(where runoff is the font name and 14 is the size). Use the font names exactly (capitalisation and all) as they appear in GIMP's font selector. Prefix all spaces with a backslash \