need help with audio sync problem after frame rate conversion

Using DVD-LaB Pro to make a DVD PAL 16:9 (25FPS)..source video is .avi download from net...frame rate 23.96 fps...DVD-LAB Pro very picky..will only take 25 fps ...not 24.x nor 25.x on the money or no cookiee! So I used CCE SP to make the most beautiful 25fps .mpg>>only problem now is the .wav (after demux) is way.way..way.and completely out of sync! How do I fix this problem..I tried the other encoders IMTOO, VertualDub(to adjust frame rate), TMPGE there quality doesn't come close(you can actually see the difference between the mpeg's! I really want to keep this .mpg for DVD. Any advise? Second question..2:3 pulldown? is that the inverse of a 3:2 pulldown? and after DVD-LAB finished I had a file in assets labeled such..it was choppy, flickered, and pixelated what was I suppose to do with that garbage?