We do our development using a local apache server, and everything works fine in
the IDE unless we do the simulated download. For whatever reason, it just
doesn't work, so I wouldn't worry too much about it. If you really want to see
what everything looks like put together, go look at it on a slow connection. As
for your 0% problem, my guess is that your preloader and any classes/library
items exported on the first frame represent 13% of your total file size, so
there's not a lot you can do about that other than faking it.
As for your PSP issue, I can't help you there.