Change filenames to help scraper

Hi,

First poster! =)

Just got an raspberry pi 512 and installed raspbmc ( love it! )
But the movie and tv scraper couldnt find all of my files on my nas, wich in return dont show all of my files in the meny.

Is there any easyway of renaming a group of files for example a season of a series, without renaming each file?
or is there an NFO maker that the scraper could read of and maybe a NFO maker? Or maybe somewhere to DL nfo? (is that possible?)

Im on a mac foremost but if the program front on the mac sucks i can access a pc =)

Anyway great community, glad i came across it!

Regards Charlie