Tom Tom 5 and Tom Tom 3 Maps

[FOZZER]

I have just installed TT5 on my M1000 replacing TT3

My question is this is there anyway to get the TT3 maps of the USA to run with TT5, as I am off on my holidays there, will need to use TT5 to navigate to the airport, fly over and switch to USA maps when i land at the other side.

Will i have to uninstall TT5 and just use 3 as before ?

Or will both programs run together TT5 for UK map and TT3 for USA?

I bet the answer wont be a easy one :D

Thanks in advance