Hmm... tried it with the CD 1 from my Tungsten C. Looks like it crashes out before installation begins...
Error message was:
Internal Error 2738. CostFinalizeCustom
And then the installer terminates.
Are you guys using the downloaded version, or which particular PalmDesktop version? (I believe the one that comes with TC is 4.1 as well...)
Anyway, that's all for now. Will report more if I get time.