Documentation
What kind of help are you looking for ?
If you just want to use the Subtile extension and install existing menu configurations - let's call them subtiles, and your concerns are about installing/uninstalling the extension or a particular subtile, you should have a look at the user documentation.
Do you want to create your subtiles, for yourself or for a web community ?
Then visit the subtile designer section for documentation and check out some available resources.
For everyone, answers to questions you may have can certainly be found in the FAQ.