Vista - Flight sim2004 will not load at all!!

I was really pumped when I got this brand new machine and was hopeful about
Vista not playing me for a fool! I got the system home and the first game I
try to load and play is MS flight simulator 2004. it was loading like a champ
until about 96-97% or so and then I get a error message stating that the
world cab files are either in use or their is not enough space to load it.
This machine has 120GB or storage and has literally NOTHING loaded onto it! I
have tried searching high and low and have even ordered XP to rid this system
of Vista until they can assure me that the programs will load and run.

BTW, CFS2 loads and runs magnificently!!! I did skip the cab files on one
load attempt, It did try to run but obviously had missing scenery all over,
but what there was, really looked better than ever.

What Can I do other than TRASH Vista??