I think the point of the original poster was that you don't need to use procmail to do the filtering. Use email aliases/forwarding in the panel instead.
1) For your public address, set up a forward to gmail.
2) In gmail, turn on the setting that forwards all mail back to another dreamhost alias.
3) Set that dreamhost alias to dump the filtered mail in whatever real mailbox you want to read it from.
That works great. I use this process on several family accounts with no problem, and no procmail work is needed. (Although I do use procmail for other things.)