I purchased mc7 (complete sound studio bundle) this week and I am trying to figure out how this works. Looks like the bundles are not attached so I have to download all 26 then extract/run? Then how do I get them into mc7 and where would they be located or do I have to import each time I want an instrument? 

Also I have no idea how to hook my keyboard up to do midi so I plan on just using what is in mc7 to play an instrument. 

The Music Creator 7 Complete Sound Studio Bundle includes Music Creator 7 + 26 Cakewalk Sound Center expansion packs. MC7 is composed of several installers and each CSC expansion pack has its own installer. Run all the installers. The CSC is a soft synth plug-in that will have all the presets and sounds from the expansion packs. 

Thanks scook! I downloaded all 26 packs and ran each one. When I bring up mc7 I'm not able to find those 26 packs, I did find the studio instruments when I go to-insert-soft synth-vst2. Am I in the right ball park?

The studio instruments are a different collection of synths with a different installer. All of the expansion packs are for Cakewalk Sound Center. The second item under MC7 in this image of the Command Center

Here is the CSC image from the MC7 doc