I don't understand what you mean. How could a Forceware driver from Nvidia stop you using SLI?
Could you give a link to where you read this or some idea of exactly what you mean.
As far as I am concerned the driver is the same for SLI and non SLI its the motherboard that sets up the two cards together. I could be wrong with that but theres many people using SLI and I haven't heard anything. Could you explain more?