to join FUF server,
open spearhead or breakthrough
in the menu options/advanced >on the right side> check the case named "console"
type in your game's console:

connect 149.202.88.84

and press "enter"

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download revival allied assault, breakthrough, spearhead:

https://tinyurl.com/y6dc2uzw

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to add the map stalingrad in your game, delete the pak5 from your mohaa/main directory and copy this one instead.
(stalingrad is already inclued in mohaa revival)

download map stalingrad (pak5) here:

https://tinyurl.com/2j3ksfye