"...so i am desperitly searching..."

Really!???
So why didn't you find this:
http://www.8052.com/forum/read.phtml?id=39006&top=
or any of the preceding discussions?

I'm afraid you're going to have to do this manually, or just write your new code in 'C', keeping your existing Assembler and just calling it from 'C'.
You might have to write a few interface bits if the assembler wasn't written with 'C' calling in mind, but why re-write the whole lot just for the sake of it?
If it ain't broke, don't fix it!