reg add for Media Center Extender- assistance requested

Hello

I'm trying to run a program that will allow me to view videos from my PC to my XBOX 360 (http://www.xbox.com/pcsetup), this program would extract upon downloading, but would not run, I looked around and eventually found the solution (http://support.microsoft.com/kb/916180/en-us), I followed given instructions and typed everything out without any spacing except after "reg add", everything indicated that the process was accepted and the key was taken, however, the program did the same thing, I ran regedit to have a look. I'm not exactly the brightest and the best when it comes to computers, but I figured if all was done correctly that the upperfilter value would be in the specified directory, instead I see a whole new directory with the whole key I entered as the name. So I suppose the questions are; did I do something wrong? Is it supposed to look like that after following said instructions? If all was done correctly, why would the program still be doing that? Oh, I also tried various combinations of spacing within the key, all resulting in a command error: too many command values (I think!), well, I googled that and read that I was getting that message as a result of too many spaces in my entries. Any assistance would be much appreciated, thank you in advance.