Tanguy is never a CRM MVP to rest on his laurels has been busy adding more tools to his Toolbox.
The latest tool is Form Parameter Manager
This plugin helps you to create and delete form parameters in bulk. Without this tool, you should open each form properties panel to create the parameter required. The same operation apply when you need to delete them.
You can download the tool from codeplex using the link below
http://xrmtoolbox.codeplex.com/