Sendmail->Proclist

I just subscribed to this list so if this question(s) is covered 
elsewhere my aplogies.

Everything it seems we need to do I hear: "use procmail, use procmail"

Okay, I give.  We run a pretty standard BSDI/Linux environment using 
sendmail, virtual mail, etc., etc.

Question, is there documentation on 'migration', that is; using procmail 
instead... or am I making this way too complicated and it's an RTFM issue.

TIA

Michael