[DisasterRadio] Need help for disaster radio

[FuZ - www.ActPic.com]

Hy there!

I bought 2 of the d-radios on aliexpress .... they work fine ... but ...
I´m not the expert with coding and flashing .... need help how to update or flash the radios .... step by step....

I´m interested in 
- how to use the Map function?
- how to activate the GPS for timestamp ...
- how can i show my position on the map ... how start an mapoverview ...
- is there an app wich I can use in W-Lan mode?
- can i link a smal webserver to share files ... like apk ... 
- can i update all the nodes via the network ....

Please answer .... my english is not the best ....

THX