I'm assuming Lime is your ISP, and not Limewire. As far as your wireless router goes and it's settings, Google is your Friend. I will throw out a few links that I found, but I'm not sure what all you need. Here goes nothing.
netgear dg834g v3 manual - Google Search port forwarding netgear dg834g - Google Search Netgear DG834g v3 - Google Search
This will show you how to find the DNS Server Address.
http://www.cyberciti******faq/how-to...rs-address-is/
Hope this helps, and I don't know what, if any, Barbados' ISP's TOS, Rules and Regulations, and God know's what else may be in affect, but I'm sure here in the states, you can use whatever Router/Modem you want to use with any ISP.
EDIT: The Spam Filter Borked the Link, but just Google DNS Settings and you'll find the info you're after.