I just burn the CD/DVD and use that media. Seems to work super. I am waiting for Alcohol 120% to issue another update soon.
Bob
Ok, before everyone starts hurling abuses at me for not googling this,I wish to make this absolutely clear that I did google a lot.And most of the results said that virtual daemon does work on vista,but I tried the latest version,and it doesnt work.Many of the other softwares come with warnings (of crashing the system with blue screens etc)...does anyone know any reliable method of mounting ISO files on vista?

Chowhound
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GameFAQs
GameSpot
Giant Bomb
TechRepublic