I have spoken before about how to install WSS on the SBS box, so it was quite nice to see the article on how to install on a member server - much simpler to do many less problems.

Installing WSS v3 on a Member Server in an SBS Network

If you’ve got a member server in your SBS network (especially if that server is a beefy SQL box) it may make sense from a performance standpoint to install Windows SharePoint Services version 3 on the member server instead of directly on the SBS box.  This is actually a pretty straight-forward process, but in case you’re not totally comfortable with WSS v3 yet, the procedure is documented below using a combination of a Microsoft e-book and the WSS on SBS instructions Chad came up with for SBS. 

Installing WSS v3 on a Member Server in an SBS Network | NoGeekLeftBehind.com

ttfn

David