New vs Old Hardware?

[cpyne]

Hi,

I wanted to install the custom firmware, but I haven't used my DSO in years and I'm unsure if I have the old or new hardware. Can anyone confirm which version I should use?

Hardware 2.6
Sys - 1.52
App - 2.53

Also, I see the instructions say to copy file GAB_N1.hex, but I also see N2.hex, N3.hex, and N4.hex. Should all 4 files be copied to the DSO at once?

thanks
Charlie