Trying to install Rayman 2 but while mounting and clicking install, it says it can't install without the disc. pictures inside

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http://askubuntu.com – I tried Gmount, furius and AcetoneISO Why can't it recognized the install files? can i configure the programes to mount into a CD type drive? pics: http://i44.tinypic.com/2hs5bfr.png http://i41.tinypic.com/2jeodi0.png and also i tried another setup file there: http://i39.tinypic.com/242e5nc.png another thing is that I jave now two virtual drives which I can't unmount "umount: /home/ubuntu/RAYMAN2_iso is not in the fstab (and you are not root)" (HowTos)