This tests that you can successfully upload a file when using the Insert tag rather than going through UpdateServlet.
It also checks to see if there is a difference between POSTing to a JSP directly and when going through wrapped forwards (i.e. like Xanadu2 does).
Lastly it checks to see that you can upload files using param names that are different to the database field name thet will be stored in.
Repeat the process using a different overwrite option to fully test the system.