Another option is to slave a Voodoo card to your AGP card for Glide based games. Old Voodoo2 cards are available on EBay. I am using a fairly modest Celery 433 and with a Voodoo2 in a PCI slot I get around 30-35 fps in online games.
Another way to improve the graphics is to install the 3D models from SWWISA. These are detailed 3D aircraft models complete with wing wires and other details. Try
http://www.swwisa.net or follow the links from
http://www.wings-of-valor.org There are also graphics improvements improvements available for terrain, structures and and sky.
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Capt. Pepe LePeu, V.C.
Skunk-of-all-Trades
209 squadron RAF
Pennae mephitis mephitisque cano "Of wings and the skunk I sing" Virgil, Mustaeneid