Hm, I've tried that in both RHLE and Ubuntu and no Tools CD icon appears on the desktop. I'll try later today to see from terminal if the linux.iso is automounted or not.
If the Desktop icon does not appear and you do not have assess thru /media/cdrom then you may have to just mount the ISO manually in the CD/DVD settings. The path to the linux.iso is:
/Library/Application Support/VMware Fusion/isoimages/linux.iso
Edit: Forgot to say don't click on Install VMware Tools menu command if your mounting the ISO manually.