Navision Upgrade from 2.6 to 4.00 - HELP!

From Navision 2.6 to 4.0 a lot of fields containing ‘GST’ word changed their name to replace ‘GST’ with ‘VAT’ and GST remained just in some multi language captions. Should I do this change manually before Step1 Task7? Is this done automaticaly by Navision Upgrade Toolkit? IF so when and by which object? Thanks!