i think you can, i thought i seen a thread somwhere before, may not have been here though. But basically its alot of effort fo not much gain. Better off just staying stock unless you really feel the need.
As above it can be done but there is not a real lot of gain over the standard vs rears. However you need more than just vt rotors and calipers, you will also need to buy a pair of adaptors to mount the vt calipers properly which you can get from most of the big performance brake places but expect to pay big dollars for them, like in excess of $500 so if you were considering doing this purely to save money unfortunately you would be better off buying the vs rotors at 100 each.