I was going to have a go at editing the existing keyguide to update it with keys for the Hover hold. I've got Adobe Acrobat, but I don't have the fonts that the PDF uses. It uses an old version of Arial mostly, from older versions of Windows and Word. I can open it in Adobe Illustrator, but I'd need to retype all of the keys, as the text isn't editable as text. I think I'll leave it for now.
Edit: Actually, there's a version 3 of the keyguide that thealx updated linked from the wiki main page. I don't think I've noticed that before. Thealx, if you see this, could you let me know how you edited the file?