executables when upgrading

I have some servers to install postgres on.  They already have 7.1 on them
and I'm installing 7.3.2.  The install for 7.1 put everything in /usr/bin/,
but the install for 7.3.2 puts everything in /usr/local/pgsql/bin.  Anyway
to make the install put the binaries in /usr/bin/? Otherwise I just have
ascript that removes the binaries from /usr/bin/ and replaces them with
symlinks to the files in /usr/local/pgsql/bin


Take care,
Jay