the author of this app says:
The powerful Pocket PC Tweaks program that can backup and undo applied tweaks! EasyTweak 2 introduces the powerful tweaks backup/restore feature, which you can undo your tweaks and re-apply group of tweaks when you want. In addition, nearly 30 new tweaks are included in EasyTweak 2.0. EasyTweak is the easiest way to modify common useful Registry hacking in Pocket PC. More than hundred tweaks which you can apply to Pocket PC easily. You can -improve the pocket pc performance, -make better security, -enable known hidden features, -tune your pocket PC in what you want to be, -even change your operator logo of your window mobile phone. NEW!