Silly question, but why not use the 722 in your sig line? It has coax in, no?
I have been but the cf card slot is screwed up and don't want to put the wear on the hard drive although I do need to send it off to get fixed. no coax in but do have an aes->coax cable
Sounds like your 722 needs to go back to SD for a major checkup! If the CF Card is screwed up, and your INHDD is flaky, it DEF needs to go back home to be fixed lol
I'd worry about getting your 722 fixed before I worried about transferring DATs, but that's just what I'd do! Once your 722 is all fixed, you can just transfer your DATs->722, once you hit up your local Radio Shack or order from the above eBay links, and get that Male BNC->Female RCA adapter so you can turn the BNC jacks on your 722 into a Digital IN/OUT setup
Then you won't need ANYTHING but a cheap little $2 adapter from Rat Shack/eBay