New ways of doing the same old things is sometimes hard to get a handle on. Sharing out printers in the 2k8 era is like that. Since the server is 64bit, when you attach a 32 bit workstation, the native driver isn’t 32bit but 64 bit.
One of the ways you can deploy printers is a utility called pushprinters.exe. But there’s a problem where the 32bit version isn’t on the box. You can either build the 32bit version of Pushprinters.exe or grab it from the link talked about here http://www.activedir.org/ListArchives/tabid/55/forumid/1/postid/32125/view/topic/Default.aspx
Like Philip said put it on a usb flash drive — http://blog.mpecsinc.ca/2008/11/x86-pushprinterconnectionsexe-must-for.html
Chad has some posts about things that are different as well… http://msmvps.com/blogs/cgross/archive/2008/12/16/the-death-of-ifmember.aspx and http://msmvps.com/blogs/cgross/archive/2008/12/16/installing-group-policy-preferences-client-side-extensions.aspx