Armada II Mod Selector
This allows you to switch between mods and keep you multiplayer game intact so that you can play online. Unfortunately, It requires a LOT of work on your end. You need to create a file to have the
mod be assoicated and recognized with this tool, and it aint easy creating them, and pretty much no mod i've looked at had that file pre-made. If you don't mind the extra work, this tool is excellent. But, for me it requires too much work to be effective.