I was trying to install VS 2008 on my laptop which has Windows media center XP SP2 on it.
I tried to open the ISO with Win Image and later with IZArc, bit in vain.
With a lot of searching, finally I got the solution that worked for me.
1. Install the UDF support for XP SP2 from:
http://support.microsoft.com/kb/899527
Install the download from the KB.
2. Install Virtual CD-ROM Control Panel 2.0 from MS:
Even after the first step, neither the WinImage nor the IZArc could read the ISO file.
Then I installed the Virtual CD-ROM Control Panel from:
http://www.softpedia.com/get/CD-DVD-Tools/Virtual-CD-DVD-Rom/Virtual-CDROM-Control-Panel.shtml
Follow the instructions and mount your ISO using it..
Thatz it.. :)