TomTom have made us aware of a new way to use custom POI warnings in TomTom 6 versions. This will remove the need for manipulating the data.chk file, and is much more flexible.
Here's what you need to do:
For each of your OV2 files, create a warning sound in OGG format with exactly the same name.
If you have a: pocketgps_uk_gatso.ov2 file
You will also need a: pocketgps_uk_gatso.ogg file
Place it in the same map folder and bobs your uncle!
(Recommended 22050 Hz sampling rate but it should not matter)
When you restart TomTom, the new sound will automatically be used. Cool, ah? (you may have to re-set the warning distance for each POI category you changed)
This will save you changing the data.chk file.
A good source for ogg files is http://tomtomsatnav.info/realvoice.html
, But you can of course also use your own creations.
Trust me it works a treat, so what you waiting for !!!!!
This worked on my 500 model, so will work on 300/700 as well, REMEMBER
to get version 6
first + BACKUP
before you do a thing! ! ! ! !