Are your current drives still in RAID 0 mode? If yes, move any files you want onto an external drive, and break the RAID in BIOS or simply switch SATA mode back to AHCI. If not, then you might want to reconfigure a RAID 0 mode for your current drives first, and get the files you want onto an external drive, then break the RAID in BIOS. After that, you can install your new hard drive and it won't be in RAID 0 mode. And no, you don't need any special programmes before you break the RAID link.