The tool I am using to edit the registry of my Shadow is CeRegistryEditor. All tutorials in this blog will assume that you have it installed and know how to work with it. In case any other tool is required to perform a hack, I shall point it out at the appropriate post.
Also, you will need to have ActiveSync installed on your PC to work the tutorials here.
ADVICE: Every time you are about to work on one of the tutorials here, perform a backup of the current registry. In CeRegistryEditor, you can do this by pressing F2 and following the instructions.