If you use the action then I have added a step to resize the template to 360 dpi, so you will not need to do this.
Whilst the action did not seem to run during the presentation it did run after and runs now.
If you have any problems with it, please post a comment.
To load the action into Photoshop:
Download the action.
Drag the action into the Photoshop window.
That is it.
The card creaser I had on the night no longer seems to be available, but here is a similar one
The paper I use is Epson Archival matte.