Double Ribbons Tutorial plus a PSP Script
Supplies One Main Tube of Choice and any other decorations.
One Mask of your choice - selected based on your tube choice
Filter: Graphic Plus, Cross Shadow.
Open your tube and mask in PSP and select a light color for foreground and a dark color for background.
Download Tutorial
PSP Script by Jean Jordan can be downloaded also - zip file below has PSP script, instructions and a mask.