How to use it?
I found lots of tutorials...
But my first and the biggest problem is when i start it, it says that select a mod package.
What is that? i select editor cache.Than i cant even open .lvl files, because it cant find models.
and in the right there is no models.I have to add or something idk.
Can anyone help pls?

i dont know anything about leveleditor, may be g1d could help you.

I don't have alot of time to get into details but I will give you basics of how to start on it.

You first creat a new mod package aka map name.
Then you select "Add"
Name: "Terrain"
M_ModelName: C&C_MapName.W3D (Must be w3d file)
Then click "Ok"
Then click "Make"

If you still have problems I will make a better tutorial but this was just of the top of my head as I have no time right now.

lolz i forgot to say i got first decade

http://www.renegadeforums.com/index.php?t=msg&goto=446979&rid=26252&srch=level+editor+help#msg_446979