whoa. I wish i saw this thread sooner. I was using the old cpu miner sse3, you mentioned in the OP. Im using 32 bit mine
my cpu is a T6670 processor (laptop) and it jumped from 1.01 KH to 1.56 KH ! +54,5% improvement!
I Bow to you mikaelh,
i dont have any fancy GPU, so i can only afford to give you 5 Y, but thats half a week of mining for me
You should be burried in apreciation donations.