Default [Q] [q] a big issue

Hello there and welldone for this usefull site.
I am new in Android world so i am little noobie
Well i have this phone BML 9500 sphs on hsdroid
I finally root it and the accidentally delete lancher UI
The phone starts but nothing show up in the screen.
Any one here have any idea of what i can do now and how??
I think i must re install the OS but i dont know how.
Wait for your ideas asap.
Thanks a lot.