I have no idea how to make a stained glass quilt, but I would love to make one. Just wanted to comment to say I think what you're doing is AWESOME! DH is a hardcore gamer, so he would really get a kick out of this. I made him a Mario quilted wall hanging for Christmas and he was ecstatic. After a year and a half of being married, I find I am becoming a bit of a 'baby' gamer myself.
To put it succinctly - kudos on this idea!!