1) Do not take apart your pistol if you are not comfortable dealing with small parts.
2) Avoid taking apart the frame if you can, mostly cause the parts are small, and in confined spaces, and can be difficult to put back together.
3) 90% of your problems will come with the slide, whether it be misfeeds, to bad o-rings.
4) I am not responsible if you screw up your pistol based on this guide(or anything else I write)

This is the 1911. I already have the sights removed, because they were falling off cause it's old, so as a note, don't pull out the part # 15 (i usually call it the rear chamber, but i'm not sure on the actual technical term) without removing the rear sight.
So that turns into this

A: Frame
B: Outer Barrel
C: Loading Muzzle
D: Rear Chamber/part #15
E: Chamber Assembly
F: Mazazine
G: Part # 31 (part of pistol grip)
H: Grips
I: Safety spring and pins
J: Hammer pin
K: Safety assembly (hand, and slide)
First we start by removing the slide from the frame. First take the magazine out, then you simply push out the pin, and pill the slide forward.

The next thing you do is push the chamber unit forward, and unscrew the barrel. (some 1911s such as the hi-capa's barrels don't unscrew, and are slightly different to take apart)

After you unscrew the barrel you pull the chamber unit out of the bottom of the slide

After you unscrew the rear sight, the rear chamber should slide forward, then straight out (once you disconnect the loading muzzle spring, if you still have one)

Then the loading muzzle should slide straight out via the grooves in the plastic.
//add photo here

Now you have the slide disassembled enough to do any maintenance you please, whether it be replacing the o-ring on the loading muzzle, or just lubing up after a hard days work.
Part 2 tonight, after I organize the photos: The frame. I'll also fix the text on the smaller photos.
Ok, this part is only reccomended if you like giving yourself a headache with tiny parts, or something is seriously wrong with your pistol.
We start by removing the grips (because they cover a couple of the pins)

Then you take a small blunt object and take out the pin at the bottom of the pistol grip, which you can then pull out part 31, which is a chunk of the pistol grip at the bottom.

Then you can remove the pin for the hand safety , and pull out the slide safety as well (NOTE: While watching out for the pin that will shoot out of the tube next to the safety, you mustn't lose this!)

The next step is to flip it over, pop the pin for the hammer out (the pin on this particular model is one way, so be careful!) and the hammer, and all the tiny pieces of the hammer assembly, as well as the spring should fall out.

Now your pistol is in all of its major components, except the trigger and magazine release aren't out (mostly because i couldn't find my little tiny screw driver) once you have everything else out however, it should just be a matter of turning the screw on the mag release, and it should pop into 2 piece and slide right out, and then the trigger should just slide right out (we already removed the spring that keeps it in place when we took out the safety.)

Questions, comments, please post them!