I see a lot of questions in this forum about how to install games using an image file (such as .iso, .ccd, .img, etc). Many people seem to believe that they must burn these files to a cd or dvd in order to use them - but this is absolutely not true.
Mounting an image file is basically like tricking your computer into believing that you have loaded a real cd or dvd-rom into a real drive, when really, you haven't done any such thing.
This process will require the use of Daemon Tools - which can be found here. Daemon Tools can work with these file formats: mdx, *.mds/*.mdf, *.iso, *.b5t, *.b6t, *.bwt, *.ccd, *.cdi, *.cue, *.nrg, *.pdi, *.isz.
After downloading and installing Daemon Tools, please take the following steps..
1) After install, Daemon tools should be running in your system tray (the far right side of your Windows Task Bar). If not, go find it in your Programs in the Start Menu.
2) In the system tray, right click on Daemon tools icon. Go to "Virtual CD/DVDROM", then "Set Number of Devices", then choose "1".
3) Right click on Daemon tools in the system tray again, and go again to "Virtual CD/DVDROM", then "Device 0: [#] EMPTY", then "Mount Image". You'll be able to browse to the image file you are wanting to mount.
4) That's all there is to it. You've now basically tricked your computer into believing that there is a real cd rom in a real drive. It should auto-load, but if not, you can find the fake cd/dvd in "My Computer" under the drive list.
Note: If you are installing a game that has multiple disks, please treat this just as you would if you were using real cd-roms. When the install asks for the second disk, repeat step 3, using the second or third image file instead of the first.