Need help modifying geobrowser.module

Hello.

I need to implement a small function in the geobrowser module.
The problem is that I am retard when it comes to hardcoding:D

The feature needed is following:
The geobrowser needs to be responding to user inputs, preferably in the http-address itself.

Like this example:
http://www.example.com/?q=geobrowser&lat=47.454&long=10.45&zoom=5&nobrowser

The all-time important ones is the latitude & longitude itself. The other ones are just bonuses.
This way people may link directly to the map feature while also having the map auto-zoomed into their local area..

If this is more than just a tad of work, I am willing to pay some money for it.
I dont know how hard this will be, so please suggest amount.
The work will (of course) be under GPL.

Regards.
Farald.