What does valid mean in PE?

How do you unlock the future stages on dbz legendary super warriors? You downloaded some sex things for sims 2 and you cant find find it? Where is the underdome in borderlands? Is there a r4 for Game Boy advance? What are some tips for Be A Popstar on postopia? Do you have to bring a psp in a box to sell it at Gamestop? How do you make shell in Doodle God? What is the floor called that is down a few steps from the street level in a brownstone? Where is the treasure in build a bear? How do you serve frosty drinks on goodgame cafe? How do you make animal jam work everyday? How do you win and complete a hit on Mafia Wars? Is the middle of the earth or middle of the sun hotter? Which metal slug game is the best? Who is Ravers fantasy girl? What are some of Bill Gates weaknesses? How do you play as Mysterio and Carnage in Spider-Man friend or foe on PC? How do you find mushroom bioms in minecraft? How do you tackle on fifa 09 on xbox 360? How do you beat the chozo ghost in the hall of elders in metroid prime?