The important thing is that the installer needs to show that your key file was detected and that you have a valid commercial license. Here's a screenshot of the installer:
See the small "madshi" text at the right top of the window, under the big "MAD" image? If the installer found your key file, you should find your company name there instead of "madshi". And all packages that your key file contain a license for should be activated by default. If you look at the "madCodeHook 3" button, it's activated (= black) by default, and it reads "commercial source code license for 1 PC". The installer must show something like this. If it does, all is well, and you should get all the proper files installed to your harddisk.