There is always a need for some good linkage for the person who missed out on a lot of the classics, or the person who just forgot about them.
http://dosbox.sourceforge.net
DOSBox, for the most part necessary to play many of the older DOS games on XP. Pretty easy to use and pretty easy to setup. I love being able to play the classic games such as Commander Keen and the Might and Magic games on my XP system.
http://www.the-underdogs.info/
The Underdogs, pretty much the best site for finding lots of good older games and where to find them.
http://www.castleofthewinds.cjb.net/
A freebie from me to you. The two part Castle of the Winds series. A fun RPG to play when you wanna play something that's easy to play and easy to hop on and off of. It's freeware now so get both parts and play.