The good news is that you don't have to do anything at all if you are satisfied with the Chart of Accounts and Balance Sheets or Profit/Loss Statements as they are.
The old way (and the way FA works without any change):
Parent Level
1 Assets Class
1 Short term -1 Type/Group 1
5 Current Assets 1 Type/Group 2
1065 Bank 5 Account
2 Long term -1 Type/Group 1
1500 Inventory 2 Account
a.s.o
First there are classes. Then there are Types/Groups in 1-2 levels. And finally the Account itself.
In this example the 5 Current Assets is a sub-group of Type/Group 1 Short term.
The new way (With Group/Types of the same length)
Parent Level
1 Assets Class
1000 Short term -1 Type/Group 1
1001 Current Assets 1000 Type/Group 2
1002 Bank/Cash 1001 Type/Group 3
1003 Bank 1002 Type/Group 4
1065 Cheque Account 1003 Account
1100 Long term -1 Type/Group 1
a.s.o
Here you can have 4-5 levels of types/groups. But the Types/Groups must be in sorted order inside the class.
This example is somewhat exaggerated. In my opinion, I am satisfied with the old way of grouping.
But some countries/organizations may require more than the 2 levels we can handle in the old way.
Therefore this new was implemented.
The Wiki has been updated with this example.
/Joe