GLIDE was the 3D technology of choice when RB3D came out a number of years ago (1997!) as the most popular card of the time (Voodoo) supported it. However, GLIDE technology has been surpassed by the more recent 3D cards (GeForce etc), so RB will only run in Direct Draw mode if you have a new graphics card, because GLIDE isn't supported by them. Someone is working on a GLIDE wrapper for RB, which will enable the latest generation of cards to 'read' the earlier GLIDE software, but it's far from perfect yet. I tried it on my system and the game played fine except for the invisible aircraft and terrain! One was produced for the game Grand Prix Legends, which works fine. Alas, I'm afraid you're stuck with Direct Draw until the wrapper is perfected.
All is not lost, though. Keep checking out the forum at
http://forums.delphiforums.com/swwisa/start for the latest developments.
Vince