Got some noob PSP questions

I finally broke down and bought a PSP. Wanted to play some new capcom games and it would be nice to have a portable video player in my pocket. I picked up Lumines, Virtua Tennis, Darkstalkers and still waiting for my copy of Street Fighter Alpha 3 from Capcom.com. After only three days of play, my battery is already down to 30%. How long does the battery last when playing a game off of the UMD? Is there anything I can do or buy to make my battery last longer? I see Sony released a higher capacity for the PSP. How much longer will that battery last?
I am converting all of my Justice League and JLU vids via PSP Video 9. I am wanting to get a 2gb memory card so I can take a crap load of videos with me for my trip to Korea/Japan. Also, is the 4gb harddrive worth it or should I wait for just the memory card or just get 2x 2gb memorycard. How long will the battery last playing just videos off the memory card? I know SFA3 will upgrade my firmware from 2.01 to 2.6 and when I get tired of playing my handfull of "good" games, how do I download my firmwire down to 1.5 to play the romz? Has anyone played or used the PSP Talkman? How well does it work? Also, any suggestion for good domestic or import games?

wooo there buddy way to many question there that you could have just easily googled(but w.e).on the subject of battery life the new battery not really that good it give u like an hour more of play. also the 4gb harddrive it so bulky and ugly, i would say just get to 2x 2gb sticks.(i have 1 1gb and a 2gb stick and it works fine for me). on the firmware subject there no way of downgrading on a frimware more than 2.00.thats mean u cant even downgrade now if u wanted to cause ur on 2.01, good thing is u can still play teh romz but ur going to need grandtheftauto to do it.otherwise u cant play romz(its a exploit in the game that lets u run unassigned code).mmm i never played talkman but i read mixed review about it. mmm on the import thing star soldier is a must if u like shumps..... i cant really think of a other one lol but i know there more.

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