I've got a neat Windows proggy to slipstream plugins into vBulletin, yes.

But I havn't updated it to process product XMLs ... yet.
My board is so hacked that even with Tools like Beyond Compare, the last upgrade (3.0.0 RC2 -> 3.0.6) took some hours to get it working again without errors, although the new Version had been tested before by the whole team for some days.
Not to mention the Style stuff which took weeks.