For the PSP... you can access it from Volcano Jungle. if you enter Volcano Jungle form South Volcano Beach, then go pretty much straight and you should find the entrance to Geyser Plains.
you have to go around ( through the big door )
It is in volcano island go into geyser plains and you will see it next to the volcano overlook enterance!
The Geyser Plains on Volcano Island
you need a stone chizzil
there are in geyser plains and in other places if you find them
Go through the geyser and into the cave, then shoot Tio Millonetis
You can neer have enough energy to pass though u actually have to go through the temple to get threw the Geyser Rock Path
You can not
NOpe :-(
no. sorry
your sims can't get married in the sims 2 Castaway for the DS.
Go to this link: http://www.actiontrip.com/cheats/the-sims-2-castaway.phtml