folder name

hi - maybe this can be done already using tokens but i have not been able to figure this out.

i need to import lots of jpegs from a directory structure and i would like to prepend the folder name to the file name

so - i have folders that look like this:
2010-09-20/img0001.jpg
2010-09-20/img0002.jpg
2010-09-20/img0003.jpg
2010-09-21/img0001.jpg
2010-09-21/img0002.jpg
2010-09-21/img0003.jpg

and what would be ideal is to bring in the files to nodes that have titles that look like this:
2010-09-20_img0001.jpg
2010-09-20_img0002.jpg
2010-09-20_img0003.jpg
2010-09-21_img0001.jpg
2010-09-21_img0002.jpg
2010-09-21_img0003.jpg

or - similarly, to add the folder name to the body field or taxonomy or something - so i can at least store the folder name in the database somewhere

if this can be done with the module in its' current state that would be ideal - i have everything working great and just need this one detail, and i would rather not have to hack the module.

thanks in advance - great module!

-- brian