Going to buy my first PSP, have a few questions...

Ok I plan on buying a PSP Slim and I want to mod it when I get it. I understand the concept, but I don't know about a few things. I am the only person who will own a PSP, I don't have any friends that own one so I can't ask anybody else to help me mod it. So its going to be a brand new PSP and I need a Pandoras Battery and memory stick.

1.Would a 4 gig memory stick be big enough to hold a few modded games and the like?

2. Would it be cheaper to buy an already made Pandora Battery and Mem Stick on ebay, or create one myself? As I am not sure how to create one, I assume you need a second battery(one normal one to play your PSP and the Pandora to mod it)...

3. After the PSP is "downgraded" or modded, how do you go about putting games and stuff on them, and then playing them?

Any advice on what to do would be great, cuz I have no clue what I should do. Thanks.

1) Yes.
2)Creating one yourself costs nothing. You can use one battery by using Booster's Multi-IPL Loader.
3)Put all homebrew games in 'X:/PSP/GAME150/'.