script to edit .net framework config

[staples]

I need to change the .net framework machine.config (XML file format) with a script does anyone currently do it?

Currently I am working on a Perl script using Perl::XML but it is not returning the machine.config file back to the same format.

I could also use VS 2005 but it is not out yet (I do not want to compile with a beta).

help.