DVCPro 50 QT Codec in Windows

I have been editing a short film on FCP 4.5 HD on a G5 with the DCVPRO50 - NTSC codec. I am trying to interpolate my workflow to windows because my access to the G5 is limited. When I open the footage on my WinXP cpu I get the whitescreen which signifies no codec. All the DVPRO50 codecs I have tried will not work with the QT standard. How can I get this to work without reencoding all my footage. Is there a interpolated solution for such crossplatorm workflows.

The G5 is running on 6.5.2 (I believe) and my XP has 7.0.3. Please help. Thanks.

Custom Windows XP Athlon 2600++ @ 1.92Ghz, 1gb 2700, RADEON 9600 Atlantis