This has been bugging me for a few weeks now.
I can't remember a lot of the details though, however here is what I do remember.
-Xander central fic
-He is moved to a different reality
-He is de-aged back to high school
-He knew the Winchester boys from his reality (Sam at least was pack)
-Finds the Winchseters in this reality and Sam gets a memory download (don't remember how full)
-Xan winds up an emancipated minor
-Sam (& Dean ?) stay in an apartment in the same complex as him so they can go to school while John hunts
This I'm not sure of - I think they are living in Colorado Springs and make friends with Jon O'Neill but....
Does this seem familiar to anyone?