Well the manual says that although the 3Dfx v2.0 is a DOS game you are supposed to run it in a Windows environment, something to do with the way Windows can allocate the memory properly, but I dunno.
I tried booting up with a floppy boot into DOS and I get the same error, can get into the menus but can't fly crashes back to the command prompt with that qrssthardwarequerry error.
I have an original Voodoo 1 here so either a) it isn't finding the card or b) the game isn't patched write from the installer. 3dfxdiag finds the card no problem so it must be the game and the card works in other games that require the .ovl driver.
I might just go a different route and get a hold of EF 2000 1.0 DOS, add the Tactcom edition, and then patch it up with the G+ patch manually and see if I obtain the same result. If that is the case, then there is a problem with the way my v 2.0 is installing the game.
If anyone has the retail v2.0 box game and can run it correctly with the 3dfx install option, please let me know though.