I have a client who is curious about this.
I'm not sure if win 7 32 or 64 bit makes any difference.I have a client with Draw 12 wondering what will happen if they buy new laptop. Draw 12 works for their needs.Like many, they're concerned that they'll have to upgrade lots of other software also, potentially exceeding the 800.00 cost of the laptop/win 7 itself.
Jeff, I haven't tried Version 12 on Windows 7 as yet. X3 seems to run fine but the majority of my time I use the newer versions. Runs perfect on Windows 7 Ultimate 32 Bit.
You should have a look at Windows XP Mode.
http://www.microsoft.com/windows/virtual-pc/download.aspx