You can modify the ONET.XML file  for that site  definition and should be able to get it done. You can change  the folder/path and filename in the settings.

but I don't see anything in the ONET.XML for that or any site  
definition. Is this a node I need to add or an I missing something?
I looked did a search for the word master  and settings but nothing
was found.

Make sure you are looking in \60\TEMPLATE\1033\STS\XML\ONET.XML

Toward the bottom, there is a <Modules> section. The <File> tag has an attribute, Url, that has the filename, and the path info is scattered throughout the document. Look for any Url or Path attributes. If you run a search, look for "Home" or any other path keywords that you would see from the address bar browsing your site.

60....I thought all of the file  for the new version were in the 12
folder?
C:\Program Files\Common Files\Microsoft Shared\web server
extensions\12\TEMPLATE\1033\STS (here I only have a doctemp folder)

here is where the onet.xml is for the new version of WSS (v3.0)

C:\Program Files\Common Files\Microsoft Shared\web server
extensions\12\TEMPLATE\SiteTemplates\sts\xml

Are you sure we are both talking about "the beta version WSS v 3.0"?

Nope...didn't know that is what you were talking about. I still haven't been able to get V3 up and working quite yet. Hehe...guess we all need to start actually specifying which version we are talking about. ;) If I can get it up soon, I'll dig something up for you.

No problem, I guess I should have specified the version, I just
thought since it was a master  page question and WSS v 2.0 didn't have
master pages, whoever replied to the post would assume I was talking
about v 3.0 but you know what they say about assumptions.

Thanks anyway and if you find out how to change  this in WSS, please
let me know.

FYI, in MOSS it's in the UI under site  settings but I don't see it
anyway in WSS.