I have 2 HR10-250's and 2 Philipps DSR 700's. I want to upgrade all the hard drives to give me more space, but I'm wondering if the following is possible? (1) Can I take the 250-GB hard drive from each of the HR10s and move them to the DSR 700s? (2) Can I buy a 500-GB SATA hard drive and make it work in the HR10? What do I need to make it work? [CompUSA has the 500-GB SATA drives this week for $179 after rebate. Has anyone seen a 750-GB that's not too expensive?] (3) Where can I get step-by-step instructions for prepping all the drives so that they can be moved to the respective receivers? (assuming # 1 is possible) Thanks for your help!