This interface is confusing as balls lol I couldn't even read your full message (i'm not even sure i'm replying correctly) but I was in the same boat as you dude, hence why I havent been making guides for a long time.
Then I found out about the Hauppage HD PVR. It costs about 120 quid - so about 200 dollars-ish - and it's an external box that links your computer to your console and your console to your tv. The rest is easy.
NOTE: it doesn't support hdmi, so you need component cables, but that aside, im in love with mine.