Aaaaaaaargh heeeeelp!!!!! me!!!!! daemon tools is killing me!?

ok so i have some of the sims 2 games installed and i had to lend my disc (which is the only one it will run off) to my friend who lost the disc so i got an iso file of the game and it worked when installing (again, because i tried to uninstall bon voyage so i could play with a different disc) but when i try and play it, it just tells me to insert the correct CD/DVD rom and i have spent three whole days of my svhool holidays trying to solv my problem and i havent had much sleep so getting this fixed could lif a HUGE boulder off my back and i can finally just chill for the rest of the holidays (im one of those guys who if has something to get done , wont stop until its done... which can be kinda dangerous...) i would appreciate all the help i can get!