Have you downloaded the KOTOR II patch yet? That was supposed to fix the crash to desktop if I remember correctly. If you already have, then I don't think there is much you can do. And of course Lucas Arts is being gay and won't allow another patch, leaving the KOTOR II community SOL.
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i downloaded everything the updater provided, i did get the latest ati driver and that has reduce the drops by more than 2/3's, but now my graphics reset them selfs everyonce in a while. and that easier to fix than dropping to desktop.thanks for the reply though.