App needed to make my 3230 work with tomtom and cark91?

[headwest]

Hi,

I'm using a 3230 with tomtom 5.21 with a cark91, converted with a pop-port cable and cm-28 cradle to suit the 3230. Problem is, is when tomtom is active the voice instructions (directions, speed cam warning, etc) will either transmit through the cark91 speaker (car radio auto-mutes) or through the 3230 loadspeaker, or more often than not, I get no sounds at all. There does not seem to be any pattern to the way this package works and often I will be driving along and all of a sudden from nowhere I will get a voice instuction telling me to turn left or whatever, which literally makes me jump out of my skin and *** only knows how I've not wrapped up my car already! Sometimes after its been quiet for a while I will get Ozzy Ozbourne reaming off several instructions one after the other, when these instructions have already lapsed (like I will get a 'turn left after 200 yards, then turn left, turn left, turn right).

So question is, is there an application I can apply to the phone manage that all voice instructions will transmit either through the cark91 or through the loadspeaker of the phone? I would prefer to use the loadspeaker of the phone, but beggars can't be choosers!

Cheers