DOES sata/IDE converter\r\n

Yes. I believe this can be used to boot up your IDE drive through the SATA port in your P4 system.

as far as i know i would say yes, but play with jumper settings on the back of your ide drive as you may have to set it as a master as well, just like the sata drive, or as a slave. The only way you will know which one will work for you is to experiment, if it works properly the machine will boot, if it fails the machine will not boot and tell you the problem but not in laymenz terms. simple work not really complicated.