map testchmb_a_00-15 and map escape_00-02

I have just made a save for each chamber and called them "1, 2, 3" etc
Then I just go into console and type "load 18" for example.

Useful commands
bind <key> <command>
save <name>
load <name>
map <name>
exec <name>
host_writeconfig
quit
restart_level

Put the contents of this folder(from the resources tab on the left) into your SAVES folder: http://www.speedrun.com/saves/Portal_Saves_TdRQm.rar

Then use the command "load <chamber number>" to load whatever chamber you want.Test chambers before chamber 10 have a 0 before it. For example chamber 5 is "load 05" in console.

You can also make your own saves. Position Chell in the exact time and place you want to load from and type "save <name>" in console. Then "load <name>"

I don't understand how it's better to have saves for maps.
The map names are really short, and easy to remember and in Portal, there aren't many maps.

Can someone explain how the fuck to make it so that cl_showpos 1 is part of the startup command? And please don't just say "make and auto-exec".

bind (any key you want) "speedrun_start;cl_showpos 1"

In cfg folder, open autoexec.cfg and edit it

How do you edit the cfg, the edit option doesn't pop up?

Open the file using a text editor (like notepad).