Enter in the textbox in the Name frame ResourceBrowser
Select Create empty MOD, once completed then exit the program
Go to <GameDirectory>\SDK\samples*
Copy the file RessourceBrowser_2006-02-28_17-46-28.zip and paste it in <GameDirectory>*
Extract the zip file
Reopen the Mod Manager
Select Test MOD in normal mode
* <GameDirectory> is the location of the game directory. In Steam distributed versions, the game directory is located at Steam\SteamApps\common\Act of War High Treason