update Go 710

We have a Tom tom go 710 which is now a couple of years old - need to update maps as many addresses in uk we visit are not on it - not enough room on current memory card which has western europe on it.
This afternoon I have ordered a 2 GB SD card. I have looked up on the Tom tom site how to transfer all current data and then to download the new version of uk map (assuming it is a newer version - not sure how I tell) To say I am confused is an understatement!
Can anybody give me an idiots guide to the above? I would really appreciate it
Andrea

[getsurfers]

You'll need a card reader. Ensure your PC shows all hidden/system files. Copy everything to a new folder on your PC. Then copy all this to your new card.

Sorry to appear a little thick but ......

I am assuming you are saying I should remove the present card from the Tom tom, put it into the card reader and copy the files into a new folder on my computer. Then copy them onto my new card. Which will then in turn have sufficient room to update.

One other question - we currently have western europe maps - I was going to buy the newest GB and ireland map - will that automatically update the GB part of what I have got or cause me problems - would I therefore be better off just buying the newest Western europe maps?

Thanks
Andrea

[getsurfers]

Yes, you have understood me correctly.

If you buy the newer GB maps then these will not interact with each other. You will need to switch maps.