need a nav file for map..

[Labarr]

So my friend has made a map a while back an its fun to play on with me and a couple of my friends. however it doesnt have a nav file, therefor we cant play against bots. My question is how do i go about adding a nav file to this mpa so we can spawn bots and play against them.
thanks!
Labarr15
If its easier to talk to me on vent, ill be there :D

[Repus]

Go in game and type something it was nav_edit perhaps in console, then nav_generate, then edit details your self (ladders, ramps, climbing spots, no juming spots)

You can also add bots to game and it will automatically make nav, but its not really good since you can do it better, it might result bots getting stuck on ladders, not using all routes and so on.

EDIT: It was nav_generate, not analyze
Tutorial:
http://developer.valvesoftware.com/wiki/Navigation_Meshes