Angry Help with karbonn a26(MTK 6577) - General help

Yeah, My friend downloaded an App named "Boot animation" - with no CWM or anysort of Backup. (Yeah, stupid, I know) Now He used "Sony ericsson" -the green one. and as he booted up, the boot logo just stuck. Mind me- the phone is still fully functional.

He can still send messages , call, Etc but the screen is just stuck with the Sony ericsson logo.

is there any way he can Fix it?

Also the screen never turns off. it just stays on with the boot logo on it.
I can still use the stock Recovery (Not that i can do anything with it!).

Any help will be appreciated, thanks.
BTW im fairly new to this place so please forgive me if I'm posting this in the wrong place.