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As "add-ons". By using something like NavAdder (your own toy) a mutator for that server - a sort of small and innocent tool which will help later in adding some panels or other things like advertising on a real soccer match - where map can be adjusted improving visuals, everything goes in client - probably Spectra knows also stuff for clients and he is good at design.
Aside, you might be willing to test more XCGE, if Linux doesn't help switch on "Win_Doze", that was original platform for playing this game.

Thanks for the info!!!