Help playing torrented mdf/s games?

So I have a windows 7 and im trying to play games that are mdf and mds files. I got these games torrented off of the pirate bay or whatever. I download the whole thing on utorrent then try to play the files and it says it cant play mds df files. So i go online and get daemon tools lite to play them on. it props up the opening menu thing, asks if i wanna install and I click yes. It gets about 2/3 of the way through and says i need to put in the disk to continue installing but i obviously dont have the disk cause i torrented it. I have no idea whats wrong if someone who knows more about this could help that would be great. It worked when i played the clannad game but after that it didnt -__- I put my free time in your hands internet. (FYI the games I tried to play were "the sagara family" and "lets meow meow" if that makes a difference)