I'm having audio video sync trouble after editing mpeg1 file

The original capture file plays perfect, all I want to do is split the file in two for burning, or trim the front and end off.

I've tried tmpgenc12a & 12i using VCD, VBR and auto all create sync problems. I've also tried MyFlix and VCDCutter to edit but all create a sync problem.

I'm capturing using an ATI AIW radeon (P3 1Ghz) using the MMC_RegTool(from this site). I've captured using all combinations of VBR, CBR, I frames only and P B frames. All
sound perfect until I try to edit them.

I'm a newbie to this and I would greatly appreciate any help you can give me. I've tried everthing I can find on this site to try and solve my problem.