insert next disc - silent hill 4

[indika_s]

hi all, excuse my noobness but this is my first time using this. so yeah ive got a silent hill 4 that is only one .iso file. I mounted it and it started to install, then half way it says insert silent hill 4 disk 1 or specify its directory, i dont understand why this is happening because it was only one file and that was the file that i mounted so what could the second file be? is there anyway of making this not happen, ive tried specifying every file in the virtual drive and none of them worked, what to do??