Vector can use slackware packages.
I'm assuming you run 5.9, which is based on slack
12.0. I've found these to be a good source for slack packageshttp://packages.slackware.ithttp://slacky.eu
Of couse, if it's not on the repos, I prefer to build it myself just because not all external packages are guaranteed to be built to vector standards.
As for your httpd question, I've never used httpd, always used lighttpd but the init scripts for the daemons go in /etc/rc.d/
most likely, for httpd you would do
Enjoy your stay