cant play game downloaded from bitlord! please help!

i downloaded the game commandos 3:destination berlin from bitlord. it is in .bin and.cue. 3 cds. i mounted each of the .cue files on daemon tools and it installed. only now, when i try to launch the game, it tells me to insert disk 3, while i have the 3rd disk mounted on daemon tools.can someone please tell me what the problem is and how to fix it? please be very descriptive because i suck in computers.

Thx.

 

I could tell you what you need to do; something very simple you're overlooking that you can use google to find out how to work around, but it's piracy which is against forum rules so i can't say.