Instructions: Follow these instructions in order and be sure you know what you're doing at each level. If you have any doubts, drop a comment below.
1. To use any 3rd party visual style, your system must be patched first. This needs to be done only once. So if you are already have some visual styles running in your system, skip this step. If not,watch this http://www.youtube.com/watch?v=41YUeg...
2. Open the 'Concave 7' file you downloaded (You'll need WinRAR or 7-Zip to open the file) and extract the two contents (Concave 7 folder and Concave7.theme file) in the following path: "C:\Windows\Resources\Themes". Do not run the file! (If you get an error when you extract, try to extract to the desktop and copy the files from desktop to the Themes folder.)
3. Run the 'Theme Resource Changer' file that you downloaded and complete the setup.
4. Run the 'AlienwareThemeRaider.themepack' file that you downloaded.
And thats it. A custom made sci-fi desktop made by yourself. Give yourself a pat on the back!