If you compiled it yourself and used as part of the options
./configure --prefix=/wwwroot
it should have sorted itself out accordingly, does with me anyway
You can change the document root when you start it up by passing
httpd -d /wwwroot
or to just use the new httpd.conf
httpd -f /wwwroot/conf/httpd.conf
Don't have it at the moment so I can't look at anything else