No, have a similar setup using a Gigabyte D510 MB, 2G ram and XP SP3 myself.
Issue you have is most likely you only have rear PDC. All cars using my plugin have both front and rear PDC, you're the first I'm aware of that only have rear.
I have no access to a E46 so I can't test myself either, sorry.
If anybody using the PDC/plugin with E46 and/or rear only.
Pls let me know if it works for you or not.