last time I did a download I was able to grab the entire file and transfer it to a different XP system at a later date..... it's been years since I played so it was most definitely an older version.
I've kept my Win7 system clean for the sake of it and used the older XP box for all of my gaming (stopped buying games around 2010 as a matter of principal), at the time their were compatibility issues with certain video cards so I'd use the XP rig and swap cards as needed depending on what I was playing.
Crimson Skies, Mechwarrior 3, Pirates moon, possibly Heavy Gear 2 and BattleZone 2 along with a few others I don't remember. It's been a while.
anyway with everything hooked to the XP rig I'm looking to keep it all there.