As long as you don't change SATA ports on your RAID drives and your SSD goes into a port before your RAID drives*, you shouldn't need to change anything.

* If you change ports on the raid, your motherboard probably won't configure them correctly without some adjustment. If you have your RAID in SATA0/1 now and you install Win7 on the SSD on SATA2, when you plug the RAID back into SATA0/1 it will change the device/partition index which may cause windows boot failures. This should be recoverable with the Win7 recovery console but figured I'd warn you to anticipate the possibility.