problems downloading

I've had a hankering for this game recently so I started looking for a torrent of it (I'm not sure what ended up happening to my CDs)

I looked around for the PC version (not wanting an emulator) and eventually found what I hope I was looking for. A nice torrent around 2.1gb for all 5 disks (install disk +other 4) merged into 1 ISO file. I mount it onto Daemon tools lite and the install window pops up...

I click "install" and...nothing happens (except the little hourglass beside the cursor for a few seconds)

what do you think I'm missing? (have I given enough info?)

I'm afraid we don't allow discussion about how to pirate software here. Safest bet if you want it to work is to buy it, but if you're set on pirating it and need help, EoFF is not the place for it.