Lots of confusion on this thread. First off, setting an IDE drive to Master will not necessarily make it the boot drive. Set the Boot order in the BIOS to tell the machine to boot from the SATA drive.
In an IDE configuration with 2 drives, one of them is designated as Master and the other as Slave, this has more to do with which is in charge rather than which the system will boot from. It would be possible to set the DVD drive as Master and the hdd as Slave and still boot from the hdd.
Just to add more confusion, it's also possible to set up the IDE drives using Cable Select in which the position the drive is connected to the cable determines the Master/Slave relationship.
Personally, I would set the hdd as Master, DVD as Slave, then set the boot order in the BIOS so that the SATA drive is the boot drive.