Enter Server:Port without spaces. eg. 127.0.0.1:8192 ( though it is never 127.0.0.1 )
Enter the url of the zip file containing the store. This zip file will be extracted to C:/Users/%username%/AppData/Roaming/VCMP/04beta/store/server-ip/ folder. i.e contents of zip file will be folders like sounds, sprites, skins, vehicles, weapons, ... (So the contents should be directly zipped rather than creating an intermediate folder )