mod_alias and mod_esi

We're using //inets/httpd in some common_test test cases with mod_esi
so we can have  simple functions for the backend.  This seems tidy and
tiny however we would also prefer to use our regular URI paths. So we
thought we could use mod_alias to remap the paths however we can't
make that work. Is this possible?

Second question would be how to debug httpd? We tried sys:trace/2 but
that doesn't seem to work and mod_log is pretty limited.

-- 
     -Vance