ttnewbie wrote:i'm totally confused guys...
1. what is this truck navcore? 
2. what do u think i definately have and 
3. how does it affect me?
 1. TT has a business/work division, that produces Europe Truck maps & Truck navcores for that industry. Using these maps & navcores, truckers, bus drivers, etc can enter their vehicle's height, width, weight etc & TT will plan a route that avoids roads, bridges, etc that are not suitable for their vehicle. 
2. You have a GO720 with the current Truck navcore 8.398 on it.
3. 8.398 will run normal maps. You won't gain anything by using this navcore. I don't know if you will lose any features by using it. 
This is a simplified explanation, but you get the picture. Keep in mind Downunder has 9.004 on his 730 & 9.205 is on my 720.