Image file to PDF file

Hii Gurus,
I am in a great trouble finding the solution for the below.

1. I want to store an Image or a picture shown on the screen as pdf file after every 15 minutes without human intervention that means automatically.

2. The file will be stored as .pdf file.
will anyone help me to find the a way to convert Image file to PDF without any trial versions of PDF creator.

3. Or can I know the way to convert Image file to .ps file So that I will use Distiller.FILETOPDF function to convert .ps to .pdf

Quick response will be appreciated .

Thank you.
Yogesh

CutePDF used to be what I used. Office saves as PDF. You might want to use that.