Sweave files generating miktex errors

Ok, yes I realize it.  So let me try to fix it:
I removed the sty files, and set TEXINPUTS to
'C:\R\R-2.15.2\share\texmf\tex\latex

I am back where I started: the tex file will not process.
Please let me know what I should do to fix the issue.
Troy

Don't do that either.

Go to Programs ->Miktex -> Maintenance (Admin) -> Settings
and on the Roots tab, add a folder, e.g., c:\localtexmf
having the same structure as the default texmf tree.
E.g., I have there \tex\latex\..., \bibtex\{bib,bst} ...
where I put all things tex that aren't installed directly
by Miktex

Michael Friendly     Email: friendly AT yorku DOT ca
Professor, Psychology Dept. & Chair, Quantitative Methods
York University      Voice: 416 736-2100 x66249 Fax: 416 736-5814
4700 Keele Street    Web:   http://www.datavis.ca
Toronto, ONT  M3J 1P3 CANADA