its so simple mate - heres what i normally do
1. back up your tomtom unit...just in case
2.erase everything on your unit
3.format your unit
4. hook unit up to tomtom home and let it install the prefered navcore for the go530 ( will do this a few times..)
5, install latest version of autoactivate onto the root of the unit
6. let autoactivate patch the navcore ( should be an option in there)
7. restart unit
8. install uk and ROI map
9. run autoactivate and patch the map
10. restart unit
11. same patching can be done for celebrity voices, and speedcams....or simply transfer the two voices from yr backup
this is all from memory as i havnt done mine yet for some time..hope that helps.