Heh you don't get technical support like this when you phone those technical support hotlines!
Here's my two cents:
1) Uninstall everything. Once uninstalled, make sure your EHM folder has been deleted (delete it if it hasn't).
2) Install the EHM 2007 Try'n'buy demo.
3) Download the v3.0.4 patch. Make sure you download the PC version. Here's the link:
https://skydrive.live.com/?cid=a0fa740e ... C5C5%21127
4) When the patch has downloaded, double-click on it. You should not have any messages asking what program to run it with; it should just run. Follow the on-screen instructions (B.Stinson posted a useful guide with screenshots earlier in this thread).
5) Download the 2011/12 rosters. I strongly suggest downloading the v4.1b 2006 adjusted rosters. The CSD Patched rosters will just add an additional layer of confusion. Here's the link:
6) Go to your EHM 2007 folder -> double-click on the data folder -> double-click on the database folder -> create a new folder within the database folder and call it something like Manimal.
7) Double-click on the rosters .zip file you downloaded. You should see a list of files. If it just shows a folder then double-click on the folder and then you will see a list of files. Select all of the files and place them in your new Manimal folder. You should then have something like this (note the folder structure listed at the top of the screenshot):
8) Load EHM and click on New Game. You will be asked which database you want to use. If you are not then it is either because you haven't installed the Patch properly or you haven't placed the database in the correct folder.