It's pretty suboptimal, but I believe RAID 0 isn't picky about brands. If there are any speeds differences, it'll obviously be a "weakest link" situation.
As far as implementation, it's up to your motherboard. If ASRock's firmware is anything like ASUS', you'll essentially set your storage as RAID in BIOS, and just after POST you'll have a timed prompt having you press a combination of buttons to get it set up (Alt-F2 for me). From then, it's pretty easy; just pick the drives, select the type of RAID, and finalize). You'll of course have to either re-install Windows on the RAID or make sure you don't select the drive with your OS on it.