So, I find that it is really helpful to type it yourself. I know that if I used a script someone else typed, I would only become frustrated. The non-custom formatting would drive me crazy!
I like to type my own script. It's useful for inserting cues too.
I mean, if I borrowed someone's electronic copy, I might end up with some crazy Rodgers and Hammerstein shenanigans where things are inappropriately put in bold.
EDIT: Split this off from the Electronic Scripts request thread, lest that get too off-track. --PSMK