another out of sync audio case when cutting/merging files

[showtime22]

I have merged a 2CD SVCD (NARC) because when i did the header trick it made the 2 files 800MEG each and i couldnt burn it with nero. so i decided to mege them together in TMPGEnc then split them into 3 mpg files and make it 3 cd's long. however once i merge the MPG files, the audio gets out of sync when i play in in Power DVD and thats no good. is there any way to avoid out of sync problems? also when i am merging the to mpg's, i am using DAEMON-TOOLS to access the MPG file.. should i be extracting them with VCDImage or some other tool? any help on this issue would be appreciated. thanks.

[BodyMaker]

you can fit a 800meg mpeg file on a 700 meg disk