A: in the /var/www/clients/clientX/webY/web folder. Specified in the vhost file. You probably dont want to change the default setting there, but i think in the apache directives you could change the Document root for the vhost.
I am having the exact same issue, so maybe I'll just take over on the help needing in this thread from here. here's my dig results: dig @localhost mgnlogistics.com ; <<>> DiG 9.3.4-P1 <<>> @localhost mgnlogistics.com ; (1 server found) ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 2656 ;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0 ;; QUESTION SECTION: ;mgnlogistics.com. IN A ;; AUTHORITY SECTION: mgnlogistics.com. 86400 IN SOA pa.mgnlogistics.com. webmaster.mgnlogistics.com. 2009093002 28800 7200 604800 86400 ;; Query time: 0 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Sun Oct 4 10:12:12 2009 ;; MSG SIZE rcvd: 83