Videos via Jay Tholen's YouTube channel: Youtube.com
NOTE: The Hypnospace Outlaw modding tools have been updated since these videos were made!
You can access the Page Builder and the Tune Sequencer in the same root folder as Hypnospace Outlaw on Steam, or you can download the tools here and put them wherever you like. Please make a copy of your Hypnospace Outlaw "data" folder and put it somewhere else, then direct the tools to that copy of the folder. That way you're not messing with assets affecting your copy of the game!