The main thing is that every point along the system of your syringe, little piece of tube, and where you connect the tube to the caliper is air tight. The syringe also needs to be able to hold about 10-15ml at a minimum (a 25ml syringe was pretty ideal for my set up). I found bleeding the brakes to be really easy, you just need to have the right tools, and follow the instructions for your specific model.

I thought in another thread you were looking for new brakes. Another vote for getting new brakes =P