Quatro cards (in this case, the Quatro 4) are designed to be used with 3d studio max, maya, etc. for professional (Think Pixar/ILM/Dreamworks) 3d modelling/animating/rendering. When trying to softmod a card to a Quatro, you are not altering the speed of the card, just the capacities the card can do, some of which -- are in fact -- performance enhancing no doubt... however you require software to take advantage of the said enhancements... and if the card is designed to NOT be used in games, do you honestly think that game engineers would input the advantages? No, because no-one SHOULD be able to use them (nore would they be compatible with other gaming-only sections of code which basically cut off both your legs to grow a third one, IE: not practical)
So, for the love of god, do NOT install the SoftQuatro software if you're just going to complain about your games not increasing in speed... the only advantages given by SoftQuatro, are for people who do professional-grade photorealistic (or non-photorealistic -- but that's a different subject all together) 3d rendering.
Non-photorealistic: Using your 3d models and rendering them to look cartoons. Still uses photorealistic lighting/reflections(if set/supported)/etc, just looks like its a 2d drawing -- rather than like Shrek 2