I have had my psp for some time now, (it's a 1000 model) and I've been havin' this problems:

first i haven't been able to watch vids, (I even have converted them to psp compatible!!) and nothin'

second I can't install new themes, I keep readin' to create ne folders under the names of "Video" an "theme" but no luck

I have the latest firmware and still nothing!

Oh! and yes, I even formated the memory stick twice

Anyone can help please?