Upgrade Project Server Evaluation Kit?

[Windy Miller]

I have installed the EPM evaluation kit (build 11.0.2003.0816.15) and want
to upgrade the server to SP2A. However, I get an error that the patch
cannot find the right version of the program. Aside from the fact that I am
using an evaluation copy, I am also running the server on a partition with
the drive letter D:\

a) Can an evaluation version be upgraded? (I thought the only limitation
was the 120d limit)
b) Could the patch be looking for the server on C:\ and how could I point it
to D:\ ?
c) I already updated the ProjectServer db so if I can't apply the patch will
I have to recreate the original db?

Thanks in advance,

Windy