I'd like to invite you to try my latest software release, it's called Mason. With it you can create setup wizards for mel scripts and/or plug-ins. In general, it automates the process of installing scripts (file copying) and integrating plugins and also installs shelf buttons.
However two features I really like most about it are the option to remove the script and the option to online-update it from the internet.
I'll appreciate any feedback right here or at the dedicated forum.
The homepage is right here: www.3dbe.com/Mason (http://www.3dbe.com/Mason)
you can download it from there or from highend3d: http://www.highend3d.com/maya/downlo...Maya-5012.html (http://www.highend3d.com/maya/downloads/tools/misc/Mason-For-Maya-5012.html)