I have uploaded the first act of "Twilight: The Musical" as a fanfic at fanfiction.net. It is
here. If you are not omg disturbed by my extreme creepiness, you can click on the link and enjoy my brother's and my work. <3
ETA: Already got a comment, from someone called "Edward-Cullen-lover9876". It says:
"i really like ur Twilight the musical its cool write new stuff plz"
This is gonna be so much fun!