GPRS and Arduino

Hello guys!

First of all, sorry about my english >.<

I’m with a problem, the company i’m working works in monitoring eletric consumption, we have a company that make the eletric monitors and one company that provide the GPRS modens to connect the eletric monitors with our system.
Now come the problem, the company that was selling us the GPRS modens are developing a software to replace ours, so we need another GPRS provider.

So i found arduino and the GPRS modules.

My two questions:

1 - The modules are exposed to high temp (they stay inside a box in the streets getting heat of brazilian sun ^^), any problem?
2 - They can be fully programmable?

thanks for everything and sorry again about my english :stuck_out_tongue: