Hi TechArch ,
Welcome to this Microsoft Project newsgroup
Tools/Change Working Time.. and in the dialog select the S for Saturday and
S for Sunday so that the columns go black. Then select Non-default working
times on the right.
You might like to see FAQ Item: 5. Default Working Hours - FAQs, companion
products and other useful Project information can be seen at this web
address:
http://www.mvps.org/project/
You might like to have a look at my series on Microsoft Project in the
TechTrax ezine, particularly #7 on Calendars, at this site:
http://tinyurl.com/2xbhc or this:
http://pubs.logicalexpressions.com/Pub0009/LPMFrame.asp?CMD=ArticleSearch&AUTH=23
(Perhaps you'd care to rate the article before leaving the site,

Thanks.)
Hope this helps - please let us know how you get on
Mike Glen
MS Project MVP