Hey Andrew, sorry if I wasn't clear, I'm trying to do this for a site workflow. Are you suggesting that I basically use a NWC workflow to do that, and have the button start the NWC Workflow?
I can see there is a difference between people who are using HTML to program the button and people who just want to start the workflow by pushing a button on a webpage.
Does anyone know if you can start the workflow with a button (without having to learn / edit) HTML code?
John, you can use the Add Custom Action method my replies refer to. This let's you add a custom action to the SharePoint ribbon. You will need the free SharePoint Designer to make the necessary edits though. You don't need any programming to start the workflow since any workflows associated with the list/lib will be available in a pull-down list.
Nintex has documentation on this if I recall correctly.