How to - download maps to SD NUVI 760

Need help, I am normally messing with TomTom maps etc and not a clue with Garmin.

But my son has a NUVI 760 and his map etc is totally outdated.

So is there a link etc of how of to download/install which map for the UK and speedcams onto a sd card for use.

thanks

If i remember correct this device may not support file maps bigger than 2GB so you have to install a map on this size !
I will create one for you only UK & Ireland ?

Thanks,

but a SD card can be fitted as I do with my TT.