It starts with un-packaging the parts from the supplier and placing them on a clipboard with double-sticky tape.
Next, the Kapton Stencil is taped down to another clipboard. Old PC boards are used for registration. I get the stencils made at http://ohararp.com/Stencils.html
This is the paste I use. $<15 a syringe from http://www.zeph.com/ They also sell other solder supplies.
To apply the paste I just use a plastic putty knife purchased from the local big-box store..
An alternate method to applying with a screen is to syringe directly. This can be accomplished with an air-powered materials dispenser readily available on ebay..