Window name for embedding iGuidance in Centrafuse is just "iGuidance" (no quotes, sorry if it's overkill to state that) and the path needs to point to wherever you have the Routislauncher files, since the location of iGuidance.exe is specified in the Routislauncher.ini. I just extracted them into the same dir as iGuidance is in.

So, in my case, as described above, the CF config looks like this:
GPS Path:
C:\Program Files\iNav\iGuidance\Routislauncher.exe

GPS Window Name:
iGuidance

And Routislauncher.ini looks like this:
[MAIN]
PATH=C:\Program Files\iNav\iGuidance\iGuidance.exe
Delay=0

Interestingly enough, prior to using Routislauncher, iGuidance would sometimes embed off-center when launched, but if I went to Music and then back, it would be fine. Since I started using the launcher, it now embeds perfectly every time. =)