Unfortunately you can only install 3rd part RAID / SATA drivers via floppy disk during Windows XP installation. Frustrating, isn't it?
It is possible to do a slipstream with the required SATA driver if you know how to do it, using nLite
Alternatively, most BIOSes these days have a 'Native SATA mode' option (or something similar) which you can enable and disable. Disabling it will allow your SATA hard drive to act as a PATA hard drive, thereby allowing Windows XP to install the default IDE/PATA driver for it...
...You can then install the SATA driver afterwards in Windows XP (if you choose to), but it can be tricky if you don't get the procedure right.