Excellent! This may sound korny, but its good to see you keeping the Greece's flag high against the contrast what you get in the daily news. I hope this shop brings good fortune for you and those around you, good job!
A tube(which is my pinup) is a transparent graphic that you save within the program called Corel Paint Shop Pro Photo. Once the tube is saved it will be available for you to use whenever you need it. The current versions of PSP use the tube extension known as .psptube. If you have Paint Shop Pro, you can use these tube graphics for all your web & graphic design projects. The best way to describe a tube is to say it works like a stamp with ink that never runs out.
PSP tube graphics: Originated from the program called Paint Shop professional. Tubes can also be used in a few other programs such as Impact, and there are a few plug ins that will allow you to use tubes.