There's a few that i us here in the UK ,, sygic and Garmin,igo8,, a few skins support these app's , but you still need to install the app yourself,,
Welcome to RR
Gps dose not have to be installed 1st ,,, don't know why it states that ,, you can run RR without GPS app, or add later when you have settled on a app to use.
but i would say ,, install the player you wish to use 1st ,,, codecs if needed ,, latest flash player , then install rr ,,, don't jump in the deep end and install a none default skin
from the skin release section of this forum,, select the default carwings skin from within the RR installer ,, get use to what RR dose and set up..
RR team and others have , made the default skin very useable , for a 1st timer ..
theres a few selections through the installer , that may still confuse you, but research will help you
I know Garmin have stopped supporting Pc version,, and sygic have brought out a new version ,, i have 2010 maps on both ,,
the downfall of Garmin is that it dose not have its own OSK,, so a hack plugin by (el camino) is needed...
sygic i have had no issues with as of yet , its simple and effective
igo8 is very graphical ,, don't know about map updates don't use it anymore...
all sat nav app's apart from ig and Mappoint are hacks , they are not truly supported by RR..