My PSP started running slow after I added the new memory stick, what should I do?

As you have mentioned you got it in feb so it cant be 3gs for sure cause 3gs is launched on 19th of this month.
the first gen doesnt have 3g speed for surfing the web. 3g is the faster way to browse the web. also the 3g is thinner. the 3gs is the newest iphone that has a video camera added to it and voice recogniztion also.Pavtube iPhone video converter, can convert AVI, MPEG, WMV, MOV, etc to Apple iPod video.
if the back is silver and it is a kinda thick phone then its 1st gen if its pretty thin and everything works nicely and the back is white or black then its the 3rd gen. the 3gs cam out this past friday too so it cant b the 3gs.
I use AVCWare iPod to iPod/Computer/iTunes Transfer which can transfer your iPod and iPhone music, video, playlist, photos back to computer and iTunes. It also can transfer information between different iPod and iPhone.
Hope it helps!HD Video Converter can easily convert HD video formats such as AVCHD (mts, m2ts), H.264/AVC, MKV, MPEG-2 (ts), DivX, HD WMV, MPEG-4 and Quick Time.
in the file menu,select transfer purchases from my ipod,and it will copy ONLY the items purchased from the itunes store
You can use an ipod to computer transfer program to copy all the songs from ipod to your new iTunes.I personally use Cucusoft iPhone/iTouch/iPod to Computer Transfer.It helps me to transfer my songs/videos/photos from ipod to my computer directly and safely.It works well for me,you can give it a try.

Mac DVD ripper could rip DVD to AVI, multiform videos/audios Rip DVD movie to video and audio formats including AVI, MPEG, WMV, MP4, DivX, H.264/AVC, MOV, 3GP, 3GP2, MP3, WAV, WMA, AC3, M4A, OGG, RA, AU, etc.

Well no need to be confused at all. There is no difference what so ever in the dimensions of the newly released iPhone 3gs and the one you have which is iPhone 3g without the 's'.