Not sure if you mean at the new or old end of the process, but...
A SCSI CDRW will read CDRWs obviously, but it is even more difficult to get a non-apple CD drive to boot a CD
I just burn lots of CDRs, they're still fairly cheap, but be warned, some brands work better than others in old drives (some barely work at all), so buy small packs until you find a brand that works well.