How to Add Comments/Notes to images in PDF?

Question

I have a file in PDF format. Some of the pages have images. I would like to add some notes to the images. More like hand writing, but electronically. Is this possible, or do I have to first convert to word?
You know how in word, you can add note box anywhere in the document. Can I do this is PDF (I have PDF 6.0)?.

Answer 1

PDF Annotator
http://www.ograhl.com/en/pdfannotator/

a killer application if used on a tablet pc