UPDATE: I was able to successfully load an Original Xbox game on my xbox 360 slim, so thank you! guys very much. However unfortunately it did cost me my partition 3 data, because I was not being careful and I touched partition 3 on xplorer360.
Rick or anybody that can help, I have an Xbox 360 (S model) with a unofficial 250 gb hard drive I ordered on Amazon. I am also using Windows 10 on a laptop if that makes a difference, and I was following this tutorial to restore partition 2 which is present in genuine MS hard drives. Ultimately...