Is There any way to put a downloaded ship on to the single player i would like to change the Sovereign to the MvamPrometheus :confused: thanx
For single player, you can go through mission scripts altering which ships are which etc - search on the forum to see how. But I don't think you'll be able to use MVAM. Maybe someone else knows this.
For the multiplayer issue, so long as you and whoever you're playing with have the same scripts installed in the same order, then you can play together, otherwise, nope. The most common way round this is to use modpacks such as KM - available on www.bcfiles.com - and others. Game names online should reflect what type of mod pack they have - match the name to the pack and you'll get there.
what about searching the forums for it? that question was answered lots of times before.