[Erythros]

@David,
I feel your pain with using TOMTOM on the TP2.
I am having the same issues you are having on my TP2, and I also had these issues on the TP1.
Using TOMTOM on my old 6700 & 6800 worked flawlessly (Neither used A-GPS).
On my TP2 it seemingly works great after a hard reset, but soon thereafter get really flaky. I have made just about every recommended setting change to get it to work consistently but to no avail.
Using Advanced config you have to specify disable A-GPS, Disable log file, delete log file.

Google and Bing lock quickly, always.
One trick that used to work would be to load up google maps which comes in mosts roms or you can get for free.
Once Google locks on to satellites, load TOMTOM leaving google maps running in the background. Quick Lock.

/Hope this helps
//Best I got for now.