I am trying to install realflight gameport controller to Windows xp pro using Radio Shack USB gameport adapter set on #2. Starting with Real Flight Delux disk which says it is for Windowss 95/98. Software does not reconize the controller or can't set up the drivers necessary. Can anyone help me with this?

You have to download the drivers from the Real Flight web site.
it's the upgrade one.

I had to set my adapter on #4.

Read down a ways. This has been hashed around on here this past week.