Arduino (BlackWidow) and Mango WIRELESS

Hello,

I am trying to set up a connection between Arduino and Mango over a wireless connection. I have sucessfully gotten Arduino and Mango communicating over Modbus Serial by following the article at http://mango.serotoninsoftware.com/forum/posts/list/0/567.page#2721.

I have also managed to set up a wireless connection with Arduino to a router and then a computer, using the WiShield library, and made a basic test HTTP server.

I would like to be able to set up a wireless connection between BlackWidow (Arduino equivalent with WiShield) and Mango. What is the best way to do this? Does anyone have experience working with Modbus IP? Is there a library to be used?

Thanks in advance, Russell