you cant check the keys by simply looking at them dude. They all look the same in writting. Just google the key type if you want to know more. Just note that they are volume keys. The MAK key is a volume key for either pro or enterprise. I think WinFLP is right about the CSVLK key btw.
Well I guess I confused a couple of people lol... I'm taking a rather off the wall guess and you might say WTF is he talking about... I'm inclined that there is a 50/50 chance it might work with all builds of windows 7 and maybe 8 cause some of the vista RTM keys worked with 7 Thats what I meant and yes next time I won't be so off the wall....