iTunes comment to Spotlight comment for books, pdfs

[PoseidonMac]

I store all my pdf files (receipts, articles, etc.) within iTunes in the "Books" section. There I am able to organize, give them keywords, etc. I use the iTunes comment field to add a few notes about each pdf. I was wondering if there is an automator, apple script, etc out there that can automatically write the iTunes comment that I enter to the Spotlight comment of that same file. The reason I ask is because if I move the pdfs to another computer or maybe send them to someone, the iTunes comment does no go along, however, a Spotlight comment would (I think?). Thanks in advance for any suggestions or ideas.