when I click on the new icon (iata70_cd.exe) it immediately pops up and says that there is a "Setup.exe" error.
I think the clue is in the name of that file - is it on a CDROM for installing Win XP?
If you want to properly install the drivers for this controller under Win XP you'll need to use the F6 Floppy or slipstreamed install approach, details of which can be found in one of the pdf files on the download page for the drivers to suit your motherboard.
Which model of Intel branded motherboard do you have and in the BIOS setup do you have the SATA drives set up in a RAID array? If there's only one drive, the controller should ideally be set to AHCI in the BIOS. The manual for your motherboard model should also be available on the Intel Website so it's just a matter of reading up and asking any further questions. If you've got to the point where you're paying to buy software to fix software or driver problems on your PC, IMO you should be considering learning how to perform a back-up of valuable data and a 'from the ground up' fresh install of the OS, drivers and additional software. I've never found software that can fix what a fresh, correctly performed OS reinstall from scratch wouldn't also fix (at no cost other than the time).