Are you saying the audio is out of sync after ripping to the hard drive, or after converting?
Audio sync problems are common on conversions, but shouldn’t happen at all on the initial rip.
Which tool are you using to convert to divx? AutoGK, Fair Use Wizard, or something else?
To fix the current file you may have to use the interleaving tool in Virtualdub. Look through this thread over at videohelp.com