Ok basically i've been making flash games for quite some time now, and the other week i bought a PSP and i thought 'hey wouldn't it be cool to make a game specifically for the psp'.

So here i am.

What i need to know is, how does a .swf play on a PSP? does it need anything downloading, or can a person download/transfer the .swf straight to their psp and it can be played?

Also, what is the ideal stage size for a game to be played on a psp?

And how do you set the controls so that you can use, for example, the letter key 'K' to represent the psp button 'O'. and other keyboard letters to represent /\, [], X.

Help would be greatly appreciated!