[xmonad] questions about dzen and xmonad

Hello together, I have 2 questions about dzen and xmonad: 1) I have posted this question in the archlinux forum (http://bbs.archlinux.org/viewtopic.php?pid=307131#p307131) but I think this mailing list is a better place. I want to use dzen under xmonad and let it show the active workspace as well as some extra information (like the output of some script). With xmonad | dzen2 (and some entries in xmonad.hs) I get the workspaces. With gcpubar | dzen2 I get a nice cpu meter. But how can I get both? 2) I have a xinerama dual screen setup. How can I get seperate dzen bars on my both of my screens? Each showing which workspace is active there? Thanks! Nathan