Making custom black/white lists of subject and body text

[Zack Clobes]

I've accumulated a black and white list of words that are found within 
the subject or body of a message that, for my purposes, guarantee spam.  
Is there a simple way to import a list of words (preferably in 
reg-expression format) to automatically black or whitelist the email? 

For example, if the subject has Viagra in it, then I'm comfortable with 
trashing it immediately.  However, if the body mentions specific 
hobby-related words that I receive on a regular basis from various 
mailing lists and individuals, then I definitely want to keep them.

I've successfully created a rule within my userprefs file and assigned 
it a high value, but I'd hate to create hundreds of these just for my 
custom list.  It seems like there ought to be a file somewhere to 
associate lists of words, similar to the whitelisting on the email 
addresses.  Maybe I'm just missing it.

Thanks,
Zack