Help, WinMob 6.1 not loading; activesync still works

[Flyview]

Hey guys,

Winmo 6.1
Onyx ?? - don't know exactly which version of the ROM, from sometime in April/09 I think. Previous owner flashed it.

I was playing with the overclocking in HomeScreen++ and the phone got stuck (like it had many times before), but now it won't load windows. I get the white screen with HTC on it, then the black one with smaller white HTC writing, and that's it, I never get to the green loading Windows Mobile 6.1 screen.

Tried soft resetting obv, taking out the battery, SIM card, SD card.

Good thing is, I can see all the folders through activesync when I connect it to the PC.

How can I recover it?? And worst case backup all my stuff (tasks, contacts, etc) IF I have to hard reset? (I know...I should have looked into backing up my stuff earlier).