Solution to change item's permission during his creation

I developed a solution allowing to change an item's permission during his addition on a list. I used custom policy to deploy it, so the solution is only compatible with MOSS.
This solution can be useful for exemple if you want to allow user to create item, but not to edit it after the creation.

Here is a link to the project (sources et solution) : http://www.codeplex.com/spchangepermission