You need a different lobby and a lobby server program.
Springlobby has hosting capabilities and I think it still works. Get it here:
http://springlobby.info/landing/index.phpThe lobby server can be downloaded at the bottom of this page:
http://springrts.com/wiki/DownloadTo install make a copy your engine/85.0 folder and put the Springlobby files in the base directory. Springlobby should find your maps when run from there and you will be able to host with it.
To install on other people's machines with no internet access copy your maps, mods, packages and pool folders to your copy of 85.0. Copying this onto another computer should work fine.
Of course test all this before you go.