Peugeot 308 installing firmware and maps

Hello all,
I have problem with playing music from new fat32 32gb formated USB.Frequently stuck and restarts itself whole system while usb is in. That doesnt happend if the usb is out. I wanted to update my firmware to latest one. Mine says it is: SMEG5.2.A.R.9
CD: 26028
FROM: 03-09-14

I found someone says latest one is 5.43.A.R2, but im not sure can i do it bymyself without errors. Can you please help me with links and update procedure. And can i update maps also ? Or for music just to try to find another smaller usb stick. Thank you

Update:
I've updated, firmware to the latest smeg+ 5 version and maps, speedcam and everything went fine :)

THANKS FOR ALL