Please, don't spread misinformation. Redneck Rampage does NOT have any 3dfx support and it's never going to.
What you did was a simple "batch" which loads NOLFB and VDMSound as the Redneck Rampage executable launches, no more, no less.
A good way of confirming that nothing's being done here would be launching the game thru the unregistered version of Glidos or removing/changing strings from the ini file someone pointed out upstairs, it mkaes no difference. First off, it doesn't even show the spinning logo and the most obvious, no bilinear interpolation is being applied, therfore, I see no reason to believe that RR "became" 3dfx compliant, get land. I ain't gonna get near to the fact that you can actually launch any game/app via Glidos, I even used it to start MSN Messenger, go figure.
VGAFix is known to be useless for a vast majority of computers out there, including mine. It's supposed to add 800x600 and up resolution support, of course, only if used jointly with NOLFB. If you have troubles getting it working (vgafix), download and use this instead: http://www.volny.cz/martin.sulak/
I GUARANTEE it will work. Once intstalled, a screen will popup asking if you wanna revert the changes, proposal you should absolutely refuse. Then restart windows to save the changes. Btw, it doesn't affect your video peformance in any way other than making it possible to run old DOS stuff in higher resolutions.
Another bullshit myth is the VDMSound trick. You can, indeed, run ANY DOS game with sound in XP/NT as long as there's a decent piece of primitive setup program to mess up with, thus you won't be needing VDMSound, at least not for RR. It's all a matter of configs and versatility of the sound setup programs, as for this game, some proper and very common settings are:
1- FX Sound Card = Sound Blaster
2- Sound Card Type = Sound Blaster or Compatible
3- Number of Voices = whatever suits you the best
4- Mixing Rate = the same above
5- Address = 0x220
6- Interrupt = IRQ5
7- 8-Bit DMA Channel = 1
8- 16-Bit DMA Channel = 5
The sound will be equally screwed up, don't expect this method to be faster or slower than the VDMSound's, because it does the same. Sound will only be faster (not much in medium-end machines though) under a glide wrapper such as Glidos (again, RR will take NO advantage of it), cos almost no CPU cycles would be used for the graphics hence you get more speed for the sound.
Cheers.