If your .zip file contains the full game, follow these general steps to set it up:
: Extract the contents of Beachhead.2002.zip to a dedicated folder, such as C:\Games\BeachHead2002 .
Inside the dgVoodoo zip, open the folder and copy the three DLL files ( D3D8.dll , D3Dlmm.dll , and DDraw.dll ) into your game folder.