*** This assumes you have a compiler ready. ***
***This guide will also tell you some basic WeeChat stuff. ***
Okay, so you want to use WeeChat on your shell (or wherever else), and you don't want to install the package (or don't want to/don't have access).
Dependencies:
1. cmake, make
2. wget, and a shell that is capable of running .sh files
-- Installing WeeChat --
For now, I have hosted it on my VPS. You can get the script now by:

-- After Install --
It should give you the location of your WeeChat install. Change directory to your install:

Then, run WeeChat:

After that, you should see a screen like this image: this image.
That's boring. Let's spice it up a bit.
Let's add freenode to our server list.

If you want to auto-connect to freenode on startup, then add -autoconnect to the command.
Once you add freenode, you can connect to it via this command:

Once you are connected, go ahead and identify to your nickname if you need to.
Once you are all done with that, it should be kind of like this: this image right here.
There you go. Join some channels, do some chatting.