I can't give you specific instructions, but due to an unrelated problem using DDS, I posted a question on the Acronis Forum, and was advised that DDS 10 is not compatible with Windows 7. The member who said this, said that he had used DDS sucessfully booting from the disk, but it didn't sound as though his use was comprehensive enough to cover all situations.
Since you now have enough drives to do so, I would recommend installing each OS on separate drives, while the other drives are disconnected. If done this way, you would not have a boot manager, and you would select the OS to boot by using the Boot Priority settings in the BIOS, or the F8 BBS Popup Menu during boot.