Also, if you do a Google search for Markus Egger, he has created the new installers for the Windows X-Wing series releases, plus a few more LucasArts games (I think a Rogue Squadron installer is also there) so you can use your original discs to install under 64 bit Windows.

Darksaber's Ultimate Craft Pack is an easy way to update the in-game ships, as is the X-Wing Alliance Upgrade craft pack, I don't know if these packs are compatible with X-Wing, TIE Fighter or XvT though, but would be surprised if there wasn't some way of converting them ;)