go to your homeworld2 directoryopen the folder labeled binopen folder labeled releasethere should be a file in there labeled homeworld2.exe or homeworld2
create a shortcut to your desktopinside the shortcut paste this line in the target line make sure to paste it over the existing line"C:\Program Files\Sierra\Homeworld2\Bin\Release\Homeworld2.exe" -mod seriousmodv1_2_1.bigthat should allow you to run the mod hopefully we can get this working in the next update hope that helps