DNSMASQ metarouter openwrt

Hello to all the members of this forum.I am glad for your community and for the knowledge that i am able to obtain from this forum.I am here to stay and not to make a question ,get the answer and leave. In my problem now..
I try for days now to configure my routerboard for DNS masking (DNSMASQ).After reading a lot in the web i understood that is not possible to do this without implementing openwrt as a metarouter which has hosts editing choice.What i mean is that when someone types a specific website i want to redirect him to the website that i choose without changing the link from url bar.(this is possible and i do it easily with a linksys with openwrt)
My problem is that i dont know how to config it.I import the tar.gz image of openwrt in metarouter section and after i dont understand how it will take ip as wan and how i will give it an other ip range to my hosts terminals which will obey the hosts rules.Its complicated what to choose…static or dynamic in the interface setup and how to config dhcp pool? please help.Thanks in advance.