You can compile it as an executable (not an apache module), then schedule it
with cron.
Run ./configure without the -with-apache= switch. It should reconfigure for
"cgi mode" (I think that's what it's called).
After you 'make' it you'll get an executable called 'php'. Use can use this
to
or alternatively, if you don't have access to recompiling or anything like
that,
set up a cron job to use lynx to hit a page (which is your php script) when
required.
you can even set event times in a db and have that script check the db for
anything that needs to be run and then perform that
