Just a few observations. We have a MVL account at our agency and recently Win8 MVL downloads and keycodes appeared on our MVL site. We always used the MAK key as our agency is more aggressive then the rest of the state moving to new OS etc.
I used the MVL x64 ISO today and as I expected, it did not ask for a keycode to install. All went well until I went to add the MVL MAK key. It has some default key present only showing the last 5 digits but it would not allow any new key to be added. I then loaded the Win Pro MVL from the Technet site and tried that. Same issue ...would not allow changing or entering a valid keycode. The bad news with no keycode is you are locked out of personalizing the profile and other issues until a Keycode is entered.
I then tried the Enterprise off our MVL site, same issue. No ability to enter a keycode so it runs non-activated.
I choose to then use my Technet Win Pro. instead of the MVL Win Pro. Will just reuse the keycodes. By accident, I had the Technet Win Pro install files loaded on my USB install media and when I tried to enter the MVL MAK, it would not accept it. I will try tomorrow to see If I can change the Keycode for this Retail Win Pro to the MVL MAK. My guess is it will not work.
If anyone has any advice to get the MVL ISO version to accept a valid MAK key post install (does not let you enter a key upon setup)....it would be awesome.
jjw
ND