In general, PSP games do not 'need' a memory stick for you to be able to play them, but they do need it to store saved game data as the PSP itself has no inbuilt space for that function.
all of the data for a certain game is saved on the game card for it
You can copy games from one PSP memory stick to computer and then copy to another PSP's memory stick. Make sure you put the game on the folder 'GAME' on the memory stick.
I'll go with the 2 GB memory stick, cos i can download the patapon 2 game in the 2 GB memory stick :). besides without the memory you cant save the game
The PSP's internal memory is only to store your settings and preferences, like your connection details for the wi-fi, etc. If you want to save music, pictures or saved game files, then you must have a memory stick.
No, GBC saved games are saved onto the the game cartridge itself.
It depends on how big the game is and how big your memory stick is. You can install a game on your memory stick just like you would on a hard drive. when you are installing the game just choose to put it on your memory stick. If you want to save the actual game (not installed) You will need to make an .ISO file (or a similar format) Programs like Record Now and Magic ISO can do this.
All game data is saved on the game cartridge itself. The DS does not have internal memory for saving game data - the DSi has a memory card, but also does not save game data to it.
no you just need to be in range of a wifi spot. but a memory stick can save your games and you can play where you left off in the game with out the game in it.
A cso is a game for a psp that is modded. A cso is a game saved to the memory card.
Any game you download from the PSN will go onto your Memory Stick. To play them, select memory stick from the PSP's menu bar, the games will be shown there.
You just need a Memory Stick inserted and if the game you play offers game saving features (most if not all do), it will detect the Memory Stick and write to it directly.