Angels have the Phone Box
Yes, I'm just a not sure if your computer will think it sees another operating system and try to boot from it. Normally the connections on the MB for the SATA cables and sometimes the settings in your BIOS might have something to do with Master/Slave configuration. I am not that well-versed in these things. But go ahead and try it, and if you have problems booting, at least you'll know where to start looking for the correct configuration.
But please make sure that the old HDD from 2007 is actually a SATA drive. I think that is just old enough to possibly still be IDE.