OP2 Mapper problems

[TheArchitect]

Hey guys, i'm kinda new here but i played Outpost 2 a lot when i was youger 

About the OP2 mapper.. why do i have to close and re-open it eveytime i extract/replace a map ?
Also, i've been making changesto the map for the Colony game "Eden starship" (cm03.map) and the changes i make
to the tiles (bitmap and type) works, but when i try to add general items (like a common or rare ore bar) on the map,
it doesn't show up in the game... is there a reason for this ?

Thanks for your time,
TheArchitect

[Sirbomber]

The .map file is just the physical terrain.  Although the mapper lets you place units, that's just a convenience for mission developers working in C++.  Since scenario files are compiled DLL files, it's impossible to make non-trivial edits to them.  If you're interested in creating your own missions, there are some useful resources on the wiki.  I wrote some tutorials that require no previous technical experience that you might also enjoy.