I'm using DOSBox V.063, an 8086/8088 emulator, on my XP machine for DOS games and am currently (happiliy) playing:The Elder Scrolls I: Arena
Master of Magic
Betrayal at Krondor
Champions of Krynn
Death Knights of Krynn
Dark Queen of Krynn
Pool of Radiance
Curse of the Azure Bonds
Secret of the Suilver Blades
Pools of Darkness
Eye of the Beholder
Legend of Darkmoon
Assault of Myth Drannor (the DOS version, not the new one)
Command and Conquer I
Red Alert I
Warcraft I
None of these would work (or even install) at all on my system without the emulator. I just love the "Oldies but Goodies".