sata 3gbps doesn’t matter so much
http://www.tomshardware.com/reviews/ssd-upgrade-sata-3gbps,3469-14.html
real world difference is almost nothing.
I’m going to bet the ready cache ssd is very slow compared to a modern ssd, but its still fast for a drive, just format it like a normal drive, install windows, nothing special, its just a normal drive. The software is limited to this drive artificially as far as I know.
Once you get around to it, install this and benchmark the drive for us
http://alex-is.de/PHP/fusion/downloads.php?download_id=9
AS SSD, pretty standard for testing ssd.