Why? Who has wav's on their computers still? BMP's are fine the way they are. Why would you keep zips and rars on your psp anyway?
Not contesting the reasons why you would need this kind of program, but I think you could leave a few things out and add some things in; such as ogg-mp3, wmv or mov mp4, etc. or even better, shockwave to flash (I wish).
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