One man jerker setup is easy. I remember trying to set up my first Jerker, and how much of a disaster that was. Thanks to my friend Craig hooked me up with this technique. He also hooked me up with a second Jerker, whoooot! The cornerstone of the technique is to set it up so that the 'back' of the desk is on the floor, and then lift it up when you are done.
First step is to get the main piece (where your keyboard probably is) perpendicular to the floor. Use a chair or something to hold it up.
Next up is to attach the legs. This should be relatively easy. If you are having problems getting the holes to line up properly, use a flashlight to 'sight' them, and then screw em in.
Now, attach the very top shelf (assuming you have one). This should lift the desk up enough for the next step...
Attach the monitor (middle) shelf.
finish off by lifting the desk up, and attaching side shelves.