Kasrkin84

Yeah, this is a weird bug, but not difficult to get around. It happens when you try to place a decal exactly on one of the diagonals that run from corner to corner across the centre of the map. It can be fixed by switching off "snap to grid" and moving the decal even a single pixel in any direction. Just so long as the X and Z coordinates of the decal aren't exactly the same afterwards, you're ok.

This is also why I find it's a good idea to leave the very centre of the map clear of decals and objects until the very end, so that you can easily see when this has happened.

Says it's currently awaiting authorisation from ModDB admins - perfectly normal for new users, it was the same for me back when I first registered.

evrerything is bugging on my computer, I think it's dying slowly, don't know if I'll be able to finish it.

Just backup the map files somewhere until you can either fix or replace your computer.

When you open up the Mission Editor, try starting a new map. In the "New Scenario" box that opens, are M42 and Cinematic Battles shown in the available mod list?

Try running the Mission Editor directly (i.e. not via Corsix) and see what happens. It should be in your Dark Crusade installation folder.