Iguidance 2011 Custom Navigation Icons/buttons
I found a guide for customizing stuff for the 2009 version but not the 2011 version.
In short you open the executable of your preference such as iGuidanceNPC.exe or iGuidance.exe with a program such as Restorator and edit the appropriate bitmap images.
Here is a Volvo Navigation arrow that i created for my carputer:
Download my Pre-made iGuidanceNPC.exe and see it for yourself.
Let me know what you think!
Also if you have a request or make one of your own upload it here!