Help accessing functions

I recently installed R and have been trying to use 'supsmu' and
'lowess'.  However I get an error message that these functions have not
been found.  I am running R on WinNT and have tried directing R_LIB to
the library directory using the instructions in the FAQ for setting up
.Rprofile and for modifying /etc/Rprofile - neither change worked.  I
see the functions listed in the modreg directory.  Any suggestions as to
how I can get R to see these libraries?

    Thanks,
    Harvey

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