Having read the thread on unlocking the 4330 and having bought a new device with IGO 8 installed i have just done the following
1/ copied Targa folder from unit to PC
2/ deleted Targa folder from unit
3/ copied IGO folder from new unit to PC
4/ on PC copy in IGO/ contents folder I deleted all the maps , voices, language, buildings I didnt want ( first attempt ran out of space)
5/ From PC copied IGO folder to Targa unit
6/ renamed IGO folder on targa unit to "TARGA"
7/ opened sys.txt file and changed screen_x to 320 & screen y to 240
8/ renamed IGO exe file to Traveller
9/ When it is up and running you will need to go into the GPS setup menu and change the com to port 7 and the baud to 38400.
this unit has always been slow at acquiring the satellites but it seems to be working ok
did like the Simon voice though, any ideas if i can copy that across
great site by the way