i have noticed that isos alot of the time come in more than 1 part(As in a few seperate rar files)when i put the individual game files in would (4 example if the game was split up into 4 rar files)will they each b 1 quarter of the game

You would need to combine them with WinRar.

i have win rar but how do i combine them

Usually you just extract from the .rar file and WinRAR will combine the file from the other parts of the archive (the .r00, .r01, etc.) for you.
If there is more than one .rar file then extract them individually first and see what you end up with.

Extract the first and it will combine the other ones automatically.

i dont really get what you mean,could you explain it better please ps:is this what ur sayin??????when i extract the iso files from each part,it will aoutomatically combine them and it will turn up as 1 file on my psp??????????????????????????????????????????????????'

Extract the first one and it will automatically extract the other ones too, so you end up with one file. Just extract the first one and ignore the others.

oh thanks:D