I think it is right!
-if you turn ON your apache2-server (in bt) to see if the victim (xp) go-to "www.google.com" "" "the traffic is redirected from your backtrack apache-server(/var/www/" [where maybe there could be what do-you-want .... site-clone .......etc .....)
ps: if the test is in the same LAN. I'd put in etter.dns the result of ifconfig of backtrack-machine
sorry my english!