Best method is to Disconnect the HDD and connect SSD.
Verify bios is set to AHCI and re-install OS onto SSD. reconnect HDD.
mehod 2. Migrate your OS on the HDD -> the SSD.
Basically you connect the SSD, boot to a Migating program such as easeUS, or EZ Gig II. Migrate the OS to the SSD. set boot priority so the the Boot order is SSD first.
PS, You do have a Installation Disk for Your OS, correct???