Convert ASF to Mpeg?



Does anybody know how i convert ASF to MPEG.
So i can burn movies to A VCD...

But they must be in the format *.Dat i guess.
and they must be splitted in 4 parts...

Can anybody help me... with this...please.

I got Easy Cd Creator 4, and when i past an ASF file into the VCD... it seems to work, but not sure it plays into my VCD..thankx