It will depend on the actual MP.
The 2008 models will not boot a Windows installation on the ODD_SATA ports (they will boot OS X, but not Windows or Linux).
But the 2006/7 models will (also have ODD_SATA ports, as the board design is similar). IDE/PATA is what's used for the optical disks installed at the factory (2006 - 2008). The reason it doesn't run on the 2008 systems is the firmware (it was the first MP to use EFI64, and full boot support for this pair of SATA ports was either lost in the coding, or dictated from on high to "go away").
The 2009/10's only use SATA for the optical bays, and these will boot Windows or Linux just fine.