Do you mean convert SWx 2004 to SWx 2000? If so can't be done.....SWx is not backwards compatible. Or do you me Pro/E 2000i? if so you will have to convert the SWx 2004 file to either a STeP or IGES but then you will have no feature history.
Best Regards,
Heckler
Sr. Mechanical Engineer
SW2005 SP 5.0 & Pro/E 2001
Dell Precision 370
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o
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Never argue with an idiot. They'll bring you down to their level and beat you with experience every time.