Getting old, my memory isn't what it was, but in this instance I remember correctly, branding.zip it is.

Pearl Navgear were running genuine Igo software, you had to pay for upgrades, maps etc.

They were keen to protect this source of revenue & their branding on these devices.

Monkey with it and you would loose TMC!

Spoiler: Loading screen in branding.zip
[Only registered and activated users can see links. ]