Got the parts from StarTech this morning, and now I have 364 HD hours and 1456 SD hours of recording! I purchased a Hitachi Deskstar 7K3000 2TB 7200 RPM SATA drive and so far it's working great. This drive does use the older 512 sector size vs the new 4K sector size, so I'm not sure if the new type of drives will work or not. Guess the only way to know is to try it.
I did encounter a couple of problems along the way though:
-the StarTech IDE-SATA adapter has the selector pin for choosing the drive type (cable, slave, master) on the same side as the IDE pins. When you go to plug the StarTech adapter into the DSR530's IDE board, this selector pin hits the 4 pin power plug on the DSR530's IDE board, meaning you can't plug the adapter into the DSR's board. I was crushed about this and wasn't sure what to do. So instead of trying to find another solution, I took a BIG chance/risk and unsoldered the 4 pin plug and moved it to the other side of the board (on the DSR530's IDE board). I was super careful and tried not to get the board too hot, but it worked.
-this takes time!! After hooking everything up and plugging in the reciever, perform a master reset, then get a hit from SD. Some channels won't come in and the guide won't fill in for approx 1.5 hours. So be patient!
-the blue light on the Drive dock is too bright, will have to cover with tape
-just a warning to anyone who places the reciever out in the open, make sure no one touches it our bumps it. It's best to have it behind the glass on your entertainment unit, or away from kids/pets.
If I could find a SATA extension cable, there should be enough room to fit everything inside the receiver (sans the drive dock). The extension cable would allow the new drive to fit where the old one does, with the adapter boards behind it. I think this would be a better setup because the drive would get the heatsinks to help keep it cool (my 2TB Hitachi is a little warm, but not hot) and the reciever would appear stock. If I can find a cable that would work, I may try this.
Nonetheless, I am super happy about having such huge recording reserves. My receiver is also snappier and quicker in every way. A big thanks to 7ninty (and Digitalhome) for posting the information/parts needed to do this!