You need the latest firmware to access the PSN, you can update the PSP from the XMB.
You need to install the latest update. This'll allow you to connect to the PlayStation Network, from which games can be purchased and downloaded.
You can't.
No, you need the latest firmware to be able to access the PSN and play the games you downloaded from it.
No, to access the PSN, you need the latest firmware update.
no unless you are using cfw (custom firmware)
You need your PSP to be upgraded to the latest firmware, in order to access the PSN and download games.
Unfortuantly fellow PSP player you yet cannot play iso's on your PSP. Persevere these few months until some gets a hack. To be on the safe side, do not upgrade your firmware. I really feel for you :).
You need to flash the DVD drive and the Xbox firmware.
The firmware on your iPod Touch may be outdated. A simple update of the firmware will set it right. It may be a download failure of the certain games. If it is downloaded incorrectly, it cannot open up to play the game.
If you want to play ISO and CSO games you probably need to have Custom Firmware. To do this you need to have a Pandora Battery and a Magic Memory Stick. For more info on how to do this go to www.pspmod.com If you can't do it you sure can play free games, http://www.pspdemocenter.com/list.php?c=demomenu or http://pspdemo.org/
Try connecting to the PSN and redownloading the games to fix any errors that might have occurred during installation, they might also need to be updated if you upgraded your firmware recently.
If you have official firmware you can only play demos If you have Custom firmware you can play all kinds of games So You Don't have custom firmware