I use some GTK+ apps a lot, such as everybuddy and I know there is a way to change the look of the GTK widgets (or 'engines')
How do you do this? What file do you edit?
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x11-themes/gtk-theme-switch
Latest version available: 2.0.0_rc2
Latest version installed: [ Not Installed ]
Size of downloaded files: 13 kB
Homepage: http://www.muhri.net/nav.php3?node=gts
Description: Application for easy change of GTK-Themes
as you see I don't have it so I don't know if this is what you want but an emerge might be worth a try