changing the application folder in file based installation

I just installed snipsnap in a  WindowsXP machine. I am running it
with file based storage. By default snipsnap fetches file from the
folder 'applications' inside the users 'Document and Settings' folder.
How can I make it run from a custom folder. I tried to change the
value of the entry key "snipsnap.server.webapp.root" to the location
of the custom folder, but it does not work. I'll appreciate any
suggestions on this.

- sushil