I was working my way through a tutorial on how to make light sabers, and well I made it to the end, and everything went great, until I had to save my completed work in photoshop as a filmstrip. The clip was already a film strip, which I had saved from premeire, but theres a problem under file > save as there is no option to save it as a filmstrip. I was rotoscoping BTW. I tried to send it back to premiere without saving it as a filmstrip, and premiere gave me some bullcrap message about how it cannot read files that are greater than 4000x4000 pixels. So i toiled with trying to make the picture less pixels(failed). In the end I decieded that I obviously had to make the photoshop file a filmstrip. Does anybody know how to do this? What is wrong? Please help.
BTW here is the tutorial I used, if anybody is excited about making lightsabers. It looks really good.

http://www.surefiretutorials.com/specialpage1.php?tutorialid=95