So I'm attempting to Hotswap my Xbox right now, and am running into a few issues. First, I have the Xbox disc drive totally disconnected, and Power+IDE going into the HDD. When I turn on the Xbox like this, I don't get an error 12, but a similar message saying "Your Xbox requires service. Please call Xbox Customer Support." with no error number. After trying to take out the IDE and putting in my PC's IDE, I turned on the PC and get a message that says "No hard drive detected please press enter". If My PC's IDE is hooked up to my xbox's hard drive it says to run set up with f4, but freezes. EDIT: Fixed this by booting up the PC before inserting the PC's IDE into Xbox HDD. Softmod successful!