screwed up the S7 by deleting too many apps

ok-so after root i tried to get rid of a bunch of apps and widgets i'd never use to free up some space using root manager.

Problem is i deleted too many and now things like google talk and some of the huawei stuff is gone and cant be reloaded.

i cant even do a factory reset, market wont work, power off button doesnt work.

can i reflash the original image? where can i get it.

 

I tried that last night but was not able to power off.

im pretty familiar with flashing roms, adb and stuff, i've rooted 4 htc evos and flashed numerous custom roms.

my problem now is that i cant power off the s7, it only goes into suspend, and if itake out the battery and reinstall it, the s7 automatically starts the power on sequence, so i cant use the button sequence to get the whole process started.

EDIT >>>>>
I removed the battery since i could power off, then i pushed all the correct buttons THEN while holding them all down, inserted the battery - all fixed and original image installed.

Thanks