I am using iGO Primo v.9.6.13.405512 in a 7" Win CE6.0 car GPS with 256MB ram/8GB storage. Would like to additionally install iGO Nextgen as an option. What are the steps and which version is the suitable version. I have read through about the below versions.

1) Nextgen 9.18.40.743913
2) Nextgen 9.19.1.665137
3) Nextgen 9.19.5.584533
4) NextGen 9.19.2.543580