I'm not sure if this would be considered modding or hacking, but I found out how to install Red Alert (Windows 95 version with Aftermath and Counterstrike expansion packs) on Windows 7 (64 bit).
One way is to download OpenRA by clicking the link
http://openra.res0l.net/.
But OpenRA has balance fixes and you can't set it to use default Westwood rules/units for the teams, but it does have GUI and graphics improvements.
There's a cool tutorial here that you can use as well if you want normal gameplay.
http://www.commandandconquer.com/for...64-bit-systems.
I didn't create that tutorial.