sNoOFy did it !
He was the first one (I noticed of) who coded a
decrypter for yC 1.2 :)...good job. Also if it hasn't
full support yet >:-)
So as I promised...here's the source code.
I hope it helps someone.

HaVe PhUn !

yoda/f2f

Check: y0da.cjb.net