Install Questions - modperl vs fastcgi

I originally setup a demo of rt using debian squeeze, which was pretty much apt-get install blah blah and then edit some text files. I am trying to setup the most current version on debian stable (lenny) and having a pretty difficult time. After installing from source, eventually the apache process consumes 99% of resources, before the end of a day. And that’s with no one using it.

So my main question is with ./configure. I am using modperl and I am just doing ./configure, make testdeps, make fixdeps. I noticed make testdeps shows the -with-fastcgi option. Does that matter if I am using modperl? Do I need to rerun ./configure using the -with-modperl option?

I am following this guide