Being a Mac user, I am used to be able to mount ISO files as accessible drives, so did look for a similar technique for Windows.
It's no quite so elegant as the Apple way, but there is a technique here :
XP: Small, Free Way to Use and Mount Images (ISO files) Without Burning Them | Windows | Tech-Recipes
It has the benefit of keeping the ISO file intact, and not having to be unpacked into an unwieldy collection of files and folders.