yes you can
Sometimes your playstation 2 thinks it saved the game in the memory. Sometimes it doesn't. If you don't have the disk try putting the disk in and if you have saved this game many times and you still can't find your game and it says it has saved it. Try taking it back to where you got it and asking them if they know what's wrong and also don't forget to ask for a another disk if possible.
No.You have to play on the same PC.
Yes, The data for the saved game is saved on the Wii itself and not on the game's disk so if you have the same game it will remember.
nope must have the disk in even though it wont be spinning
Only if you have saved it to your hard drive.
This is to prevent people from renting games and installing them on their harddrive.
Well if you have it installed then just try to open it and if you cant then you would have to buy the disk
No. You still need the disk. Therefore it is pretty much pointless to download the game to your hard drive.
Cartridge and disk video games are simply two styles of storing the game (mostly old and new) sort of like floppies verses CDs for computers. A cartridge is mostly the older way of storing a game for example a lot of the first video games for game systems were on cartridges, which were plastic blocks with the important hardware inside them and one side was open where it was fitted into the system. With cartridge games the saved game data was usually stored on the cartridge it's self. Cartridge games still exist to an extent though they are much smaller for example the game boy SP and advanced games could be considered cartridge games though I am unsure whether DS is quite a cartridge game, older examples are the N64 and most older game systems. Disk video games are exactly what they sound like the game is stored on a disk (similar to a CD or DVD though usually a different size etc), with disk video games the player's saved data is usually saved on a separate memory card. Disk games are much more common now especially with game systems you hook into the tv as oppose to handhelds, for example Game Cubes, Wiis, Playstations, etc.
The data saved by a game on a console can be access by any other copies of the same game.
No you have to keep putting the disc you can only play a saved game unless you have the game downloaded
The game (or Session) yes. The Town No (it is saved on the hard drive or Memory card)