Well, yes and no. Depends. Acrobat and Reader can write data to the local hard drive under certain restrictions. If this is a design side activity that will be run from Acrobat Pro, then it's not a problem at all. But if this is in a document that is viewed with Reader, then it becomes more difficult, if not impossible.
What exactly is it your are trying to do?
Thom Parker
The source for PDF Scripting Info
www.pdfscripting.com
Very Important - How to Debug Your Script