Cheat for Final Fantasy VII

Hi people.I know not a lot of people play this game any more but i recently started playin it again and its really good but i have a question.

People say you can use the Knights of the round summon with quadra magic but when i tried it it only did it once,is there a way to get it to work 4 times?

If there is anyone out there who still plays this please post your answer on here as that would help me a lot.

Also in some of the cheats below i made mistakes,first off you dont get dios diary and signature,and also the area you get "contain" is mideel,no gongana.Thanx a lot.Bye 4 now.

Theres loads more info this game, right here, with some cheats and tips, answers and Final Fantasy VII walkthrough.