Hello everyone

I have recently bought Original Entertainment Media CH-4100 DVD. and also SNAV-1 Add-on navigation module for OEM's (same as the Jensen)
the item looks good, and works good,
however there are no maps available for Mexico (which is where I live)

the software that is used is navteq. i contacted them but they mention that there is no maps avalabile for my model and will not be, period (this seems not to be inproduction and or their contract with OEM is over)

I heard that some people have been able to modify or add other softwares (such as Igo)
can any one point me to where I can find information on how to do this?
I will really appreciate it

thank you