How can you setup wss to accept infopath forms web? or

How can you use infopath form services in wss?

Well, sorry to disappoint you, you cannot unless you have MOSS (Microsoft Office SharePoint Server) or Microsoft Form Server Installed

WSS only have the basic functionalities and doesnt include the features of MOSS

Some of the features not included in WSS are

• My Site
• Site Directory
• User Profiles
• Site Manager
• Portal or “Enterprise” templates
• Search
• Knowledge Network / People Search
• Business Data Catalog / Business Data Search
• Document Workflow
• Excel Services
• Business Intelligence
• Report Centre
• Forms
• Social Networking webpart etc and much much more

So if you need the above features you need to upgrade to MOSS.

PS: Also just found this out on Microsoft website “Microsoft Office Forms Server 2007
Office Forms Server 2007 is no longer available for purchase. The capabilities of Forms Server will continue to be part of SharePoint.”