Create folder sync with automator

I have a few machines runnign 10.4.11 in our office that we are trying to back up to a NAS.

However, I can't seem to get any sort of workflow via Automator to work. Does anyone have any advice on how to set up a workflow that creates a weekly backup? On my iMac (10.6.8) Automator has a really easy setup for this, but 10.4.11 is quite a bit different and I can't figure it out.

Thanks!