local modules

[Ed Kademan <kademan@phz.com>]

What is a good strategy for installing local modules for scsh?  I'd
like to package up code so that different programs can share via the
"-lm" command line switch but ideally I'd like to not have to specify
the complete path names.

For example when you "use" and "require" packages in perl that
language automatically searches for the corresponding files in a
user-modifiable path of directories, one of whose entries is a
site-specific directory that doesn't get trashed every time you
upgrade.