Doom3 cd installing help. ISO's with daemon tools

[Help Daemon Tool w/Doom3]

I downloaded doom 3 and it contains 3 ISO images(3 cds) "cd 1 cd2 cd3 "
when i mount cd1 to virtual drive F and autoplay it..it does the whole process but when it ask for cd2..i try mounting isocd2 to virtual Drive F, but it wont work then i tried Virtual Drive G and it wont work then i tried CD1 in Virtual drive F and cd2 in Virtual Drive G and it wont work. So how do i mount an image when cd1 installation asks for cd2?!?