No, it's not hiding file exertions.

That doesn't appear to work :/ Same error.

Read my post above.

I removed those and it still doesn't work (scripts/vscripts). As for why my steamapps is in my desktop.....that's a long story involving glitching computers and faulty graphics cards.

Here is another image http://i.imgur.com/ljcWnXT.png

Last resort:
Close and then open the .nut file with just normal notepad and not notepad++.

I'm bloody going to upload my example and see if it's just your computer.

Interestingly enough, the file does not appear when using normal notepad.

I'm betting it is my computer to be honest at this point :/.

Either way, I really appreciate all the help.

OK, is the folder scrips/vscripts under the same directory than Portal2? I mean, into portal 2/portal2/scripts/vscrips.

Yeah it is .

Man, try the attached script and let me know.

EDIT: Oh, and just in cases, restart Portal2

Guess I was a minute late, here's mine with the example map.

portal 2.zip

Still isn't working, arg! Ill send you a message...one moment.

Trying Chicken's now

Chicken, yours works. I cannot thank you enough. I don't know why yours didn't Jose. But I also want to thank you very much for your help as well. Sorry if I was just being super annoying or dumb at all through this process. The help is very, very much appreciated. Thank you both very much.

Hmmmm... weird. This is the one I made for my map Da-MaSK and did actually worked out perfectly (I applied not to a single cube, but all of them in the map, so I searched by class name):

function ChangeCubes(){
   Entities.FindByClassname(null, "prop_weighted_cube").SetModel("models/josepezdj/metal_box_jose.mdl");
}

Odd, maybe I did something wrong with yours?

Remember, Tmast, SetModel doesn't change collisions. If you SetModel a sphere into a cube, it will become a box that rolls around and acts like a sphere. Unless your custom model is shaped just like a cube, I'd recommend an env_entity_dissolver to destroy the boxes.

Yeah, that reminded me to my trial of turning a Frankenturret (monster cube) into a regular cube last year

OFFTOPIC:
About Portal being on the desktop: Symbolic links ftw!
If someone has steam installed on the OS partition (C:), and periodically backs up the partition with a backup program (norton ghost, macrium reflectm etc), should consider moving the steam installation to another drive. It can be done normally with lot of registry tweaking, or just moving the whole dir and making a symbolic link to it. So the Steam dir is still on C: but phisically its on another drive. I use it all the time. (Symbolic Link Creator):)
There are free programs to create junctions or hard or symbolic directory or file links. For example my Steam is installed on drive e: but the portal 2 dir from steam is moved to an ssd. I also moved My World of Warcraft's Interface directory to the SSD, thousands of little small file that loads so slowly on a normal HDD.

You don't even need to download anything; use the mklink command on Windows and ln on anything else.

If you install any game on steam doesn't it ask you if you want to put it in a new directory anyway?