I am a photoshop user too and although i haven't done this yet YOU CAN USE TUBES!!! there is a program that will extract the tubes and change them into PNG files just like the other elements we use. SO if you have a hankerin' to go on a Tube hunt on the internet YES YOU CAN USE THEM
Here is a program that is free called Tube- Ex
http://www.freedownloadscenter.com/M...s/Tube_Ex.html
here is it's home page
http://www.mediachance.com/pbrush/tips/tip2.html
it has all the directions you need there. I haven't tried this yet ( Mostly because between collecting fonts, elements, rushes,and other items I'm afraid to get addicted to tubes)
Have fun!! and if you have any tutorial requests for Photoshop 7, CS, or Elements please visit this thread here and one of the adobe people here will take it up
Taking requests for Photoshop Tutorials
I'm sure you're going to have a great time here all the ladies ( and gents) are very helpful!