In reply to steve taylor:
i suspect the biggest issue you might have is that CS3 isn't 64bit native
it also has problems with (network) drives that are more than 1TB in size and various other "quirks" So it may well come down to the actual spec of your chosen machine.
not much help i'm afraid, i use CS5 on 64bit win7 machine. the marketing team in my office use mostly CS3 and 4 but we're also still only on windows xp
Post edited at 09:53
