Two Questions, Regarding Ripped Digitizer and Un-Responsive Home Key

Hello everyone, I'm new and I just watched one of the simple youtube videos on how to replace the LCD/Screen and backing for A Verizon Iphone4. It went very well, except for the fact when it came time to put the motherboard in the phone, I thought it was catching on the digitzer that is connected to the LCD. So like an idiot, I stretched it out and snapped it right off the cord, I thought it may work just putting the top of it over the side but that obviously didn't work. I was just wondering if there was a way that I could possibly swap out that cable/(digitizer) from my old LCD with a broken screen, to my new one. The second question comes with my home button, while I was installing it, it didn't seem like it was very sturdy and it was hard to keep it in place because it was a bit loose. But anyways, once I did eventually get everything together, it powered on and the digitizer caused the screen to not let me slide to unlock, and the home button seemed to be un-responsive and it didn't have like any play that a normal button would, it was just stuck in place almost. Any help would be much appreciated, and I appologize if I had skimmed over a thread, where someone else already answered these issues. Thanks!

TL;DR - Ripped Digitzer, can I replace just that, with possibly my old one without the old LCD( Broken Screen). Home button feels permanently stuck, doesn't do anything.