TomTom XL 4ET03 help

Hi there i am a complete newbie to this.
I Have a TT XL 4ET03 and would like to install a usa map as i am going on holiday there. How would i go about knowing which verison of maps to install with a patcher lol here is my device info

TTGO.BIF:
DeviceName=TomTom XL
DeviceVersionHW=XL
BootLoaderVersion=55274
ApplicationVersionVersionNumber=9151
ApplicationVersion=605385.2
CurrentMap=United_Kingdom_and_Republic_of_Ireland
CurrentMapVersion=860.3101
TTGO.BAK:
Not Found...
TTGO.ORI:
Not Found...
TTNAVIGATOR.BIF:
Not Found...


Thanks in advance

Procedure is the same as in your other topic, just a different map - please check the map chart.