if you installed a minimal version of slack 10.2 yo may not have dhcpd or dns but if you look to the CDs you`ll find something called dhcpd (DHCP daemon) and bind (daemon for DNS) the only thing you need to do is to configure and this should be your task, try to search through the forum or google
about Active Directory, try googling about MKS AD4Unix, and generally about active directory and linux distros.