How is the wifi module used?

I've used the search funtion but didn't find my answer.My question is I've downloaded the newest version of mapthis! and see that the wifi module now works I don't know how to use it though.(with the psp-290)

(My firmware is 3.71-3 M33 just in case it's needed and I have a "fat" psp)

Any help on how to use it would be appreciated.

1) make sure LOADWIFI=1 in the config.txt
2) setup wifi access point before you enter the program
3) in the wifi upload screen,enter approximate gps coordinates of the place you you need the map for.
4) enter most detailed zoom - (0 is the closest)
5) enter map size: 8,16,32.... with 8 giving you a map with 2 zoom levels, 16 with 3.. etc...
6) hit start to download the map