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Hey all;
This is my first post however i can not find any reference to a psp being used in this way so i hope its a good one!
I recently purchased a new car stereo that play mp3's and features a USB port on the front of it for USB Memory Sticks.
(
http://www.tesco.com/electrical/product.aspx?R=8220866 to be exact)
Last night i was watching my PC detected my PSP when it struck me that when you plug a PSP into a PC it registers as a Mass Storage device with windows formatting, as do most USB Memory sticks.
Low and behold i decided to plug my PSP into my Car Stereo and Select USB Mode and now i can play all MP3's and WMA's stored on my PSP directly from the CD Unit!
I hope this is useful to someone as it made me smile

No more burning CD or carrying around pointless USB Memory!!!
( PS Occassionally my stereo doesnt detect my PSP but unplugging it and plugging it back in a few times solves the problem! )
Cheers;
Fin, York
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I dont think i have explained this clearly enough.
It is not playing music from your PSP by an audio cable! It's reading the music files on your PSP via USB and having control of them from the CD Player, making it easy and safe to change / FF / skip tracks, and for people with 512MB + memory sticks, a decent music collection that you can carry about and plug in your car and go!