Default Exec wont start after changing registry

Hi, need help here.

I just got me a new Atom Exec. Every time I tweak my registry like i normally do with my Blue Angel and himalaya (Change SIP, screen sensitivity, and other registry tweaks in the wiki site, etc.), doing it all correctly and restarting. The Atom Exec wont turn on and get stuck in a white screen.

I have to hard reset it always, tried it several times. Same happens with my Wizard. Are their registries modifiable? How do i permanently set my input method (i always use Blimkeys and want to set it in default) and change the touch sensitivity?