How do i know if my psp is the original or the slim and light?

My brother just gave me his psp : D So how can i know if it's the original or the 2000 slim and light?
I downloaded Bleach heat the soul 5 for the psp using a torrent on Vuze but all that came out as a folder with a bunch of useless files. Please tell me how to put it on the psp.
P.S. I got the custom firmwareWerent they planning on making the PSP GO a phone?
you check the appearance if it's a 1000 or a 2000,DVD Ripper can best dvd ripper MPEG WMV DivX H.264/MPEG-4 AVC MP4 MP3 WMA excellently.
first the thickness of the psps:
you can see that the psp 1000 is more thicker than the psp 2000.
second the weight:Makayama is working on DVD to Palm and iphone dvd converter, among other programs.
you can see that the psp 1000 is heavier than the psp 2000.
third, the look:
turn them over at the back.
try touching them or whatever. then, you can see that the psp 1000 has a kinda 'rough' back while the psp 2000 has a glossy back.
that's just my 'quick' info : DDDDDVD to Apple TV Converter, award-winning DVD to Apple TV Video Converter to rip, proves professional to convert DVD to Apple TV video easily.
The PSP Go was originally going to be a PDA/Gaming system. It was also going to slide to the side, not the way they have it now. I am looking forward to getting one, but I don't think its going to be as good as they are trying to make it look, it can no longer play UMD's, but the the new Digital update for it will be fantastic. I saw screenshots for the upcoming PSP game: Assassins creed: Bloodlines, and the graphics look better than the PS2.
In a way, you could use it as a phone. Verizon has a new broadband internet card that converts normal broadband internet into a Wi-Fi signal, and it is portable, so u can use wi-fi speed anywhere. The PSP Go uses Wi-Fi. It also comes with skype. so if you had the wireless card thing and a psp go you could use the integrated mic and skype as a phone.