Originally Posted by MaPePeR
Thats a REALLY good question.
Could you please go into detail which "test" key you mean and where to find it?
You can use the "test" key contained in any of the currently availabe keystores. For a practical example, look at how it's used for the Font Hack for the Kindle Touch, in particular its build.xml and referenced files (all of the sources are freely available from https://bitbucket.org/ixtab/ktfonthack