Now, you want to make units from VI available in MTW is this right?

Ok, just for an example, Welsh Bandits. First of all, open up VIKING_UNIT_PROD.TXT file (NOT in the Gnome editor.) Scroll to the bottom of all the entries, and about 14 lines from the bottom you should see WelshBandits on the left. Select the whole line and the line following it, then "copy" (CTRL+C) these two lines.

Now open the CRUSADERS_UNIT_PROD11.TXT, scroll right to the bottom and paste (CTRL+V) the entry for the WelshBandits here.

Now save the file, and open the Gnome Editor. Hit load file and open up the CRUSADERS_UNIT_PROD11.TXT file. In the top left, select "Availability" then hit the scroll right until you come to option 50. In the box it should say "FN_08"
Chaange this to ALL_FACTIONS, then scroll right again to the last option, 71. Click where it says "NO", then if you don't see the line FN_08, press the down arrow until you can. Change the FN_08 to ALL_FACTIONS again.


This will make them available to all factions of course, but to stop them from being built by them all, you can either;

Change ALL_FACTIONS to a specific faction, eg FN_ENGLISH.
Note: if you put two factions, FN_ENGLISH, FN_FRENCH you need to put them in speach marks; "FN_ENGLISH, FN_FRENCH"
You should also be able to play Welsh Bandits as whatever faction you specified in cutstom games, and multiplayer names if all other players are using the same prod file.

Or;

You can make them region specific, ie. a faction must own a particular province before being able to build them (this allows the unit to carry on being built, even if English are killed.) To do this, go to option 51 (Region Label) and type into the box ID_WALES - this will mean any faction that has control of Wales can build this unit.
Of course, this means they won't be available to a faction in custom games



Now save and load the game