what type of iso image, if you have operating system it not possible normal, you have to get some to make it work..
just normal application cd images , just burn it as data dvd or cd & you can use any with disk mounting tools like daemonstool, poweriso, ultraiso,,
some free programs
http/www.freedownloadscenter.com/Search/virtual_drive_W1.html
http
/www.thefreecountry.com/utilities/dvdcdemulators.shtml