VGAP 4 and Windows Vista

I recently purchased a second hard drive, for my PC, and installed
Windows Vista RC 1 (x64 version). I was able to install VGA Planets 4
without issue. The player program started normally, but when I tried to
open an RST, the player spouted a veritable litany of error messages,
then crashed. I then copied the data folders from my primary hard drive,
and reopened VGAP 4 player. I was able to play a turn normally, but when
I attempted to write a TRN file, the same (or similar) litany of error
messages popped up.
It is possible the UAC, a sometimes annoying Vista security feature,
could be the culprit, but none of the error messages I get mention the
UAC. I am considering turning this feature off, to see if Planets can
then read RSTs, and write TRNs properly.

I have recently read an article about vista, and one of the big problem
with games is that it is forcing the use of direct x so programs
designed using open gl are going to be a problem for game developers.
Also I have seen a indication that Tim will not be supporting Vista
also. Very likly that some of the controls in power basic use open gl.
Will post more if I find where I saw that but may have been on Wiki
which has been down for some time now.