No, you shouldn't need to.
No they can not. Although you CAN play PS1 games in a PS2, you'll need a PS1 memory card to save them.
Yes, to store PlayStation 2 game data you need a 8MB (PS2) memory card. The PS2 will still play most games without a memory card
Yes the Playstation 2 unit will play all the original Playstation games no special equipment is needed except an original Playstation memory card if you desire to save your game progress.
No. You just won't be able to save the games. You build the memory cards in the HDD for the 4 USB port models that play PS2 games and many games need to do this
yes,you can create an internal memory card and start for scratch with all of your playstation games or you can get a memory card adapter driver which is about $10.00-$15.00 and convert all your saved games from a playstation memory card and play as you would on a palystation
Yes, you can use them to save PlayStation 1 games when you play them on the PlayStation 2.
You do not need to have a Memory Stick inserted to play games if you have UMDs.
There's no other way, they need to come from the PlayStation Store.
original not slim
No then their would be no need for a PS3.
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.
Yes a person can play playstation games on a playstation 2 .i have a playstation 2 and i can play ps 1 games on it.