I recently purchased the Earth 2150 trilogy.
The game runs wonderful, no slow down or anything, except when i hit the construction design tab, this causes the game to crash saying its a apperror.
I am running:
Vista 64bit ultimate
AMD Atholon 64-bit X2 Dual Core Processor 6400+ 3.2 GHz
Nvidia Geforce 9800 GT 1gig
I have plenty harddrive space, 500gb free still.
Also I have tried running it in different compatibility modes and still get the same error.