The process is slow and cumbersome, but it can be done. Here's an IMDB script for people images. Processing options are hard-coded at the beginning of the script file.
WHY YOU PROBABLY WON'T BOTHER
If you set silent mode in the script and in PVD you'll get one image (maybe a group shot, poster, thumbnail or anything else you don't want).
If you select images manually from the script's selection list you'll be loading images into the new year. It's a slow thing to select a single 'best' image from 800 when the selection list is 20 items and takes ~ 1 second to display a single thumbnail.
When you're "done" processing IMDB you'll have less than 20% of the people in your database covered. Since a script cannot process a list of people (created, say, from a site index), you'll have to run a script for every site and person combination. That's a lot of internet connections. I have a list of 240 sites and 70,000 people in my database. @ 50 - 100k per page, that's a lot of bandwidth and time.
Once you're processing other sites, you'll find that typos, language variations (ie. umlauts), alternate names (akas) and people with common names will make matching images to your database a hit and miss enterprise.
If you have a favorite actor / actress, choosing multiple PERSON images via a script IS NOT POSSIBLE. Been there, done that.
AN EASIER WAY
Write an export template that creates MKDIR commands...one directory per person (probably include the IMDB ID in the directory name). This saves you from naming your image files.
Open your file manager and drag images from whatever web page you're on, into the image directories. Yes, you can drag and drop from web pages...maybe someday even directly into PVD.
Use the load an image option from your skin, and use the "no image" filter to limit the people list to those you don't have images for.
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