I released that whenever I try to change theme, the whole color scheme of my device will screw up. Theme that should appear black turn out to be green, black theme have blue color appearing in the bottom bar etc. No theme seems to be able to work in my device. I suspect there is something wrong with my registry. I tried soft reset, safemode (ilauncher), registry cleaner and fixer (SKtools) but none could help fixed this problem. The whole color scheme in my device is all screwed up.
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I'll try to answer in 1-2 days. Please be patient.
Give a try to the BaseHue app to see whether it works. I've just posted a quick tutorial on it to http://www.pocketpcmag.com/cms/blog/9/quick-tip-changing-bar-system-color-base-hue-under-wm5
Also note that, in the meantime, I've published two articles on theme creation / conversion / management. See http://www.pocketpcmag.com/cms/blog/9/tutorial-review-free-excellent-theme-editor-tool-themegence and http://www.pocketpcmag.com/cms/blog/9/roundup-current-windows-mobile-theme-editors .
Hope they help.