Simulating class with kits, Do you know if... Options

[egm]

... it's possible to use specific effects or scripting actions with a specific kits?

For example: dwarves can't be mage. It's a fact.

There is an effect which is described as below

#72 (0x48) IDS: Set IDS State [72]
    Parameter #1: IDS Entry
    Parameter #2: IDS File
    Description:
    Alters the IDS state of the targeted creature(s) specified
    by the 'IDS File' field, to the value specified by the 'IDS
    Entry' field.
   
    Known values for 'IDS File' are:
    1  Generic
    2  Race
    3  Class
    4  Specific
    5  Gender
    6  Alignment
   

Does anybody test it?

There are also two scripting actions that might be interesting:

156 ChangeClass(O:Object*,I:Value*Class)
Changes the class classification of the object to the value specified. The class values are found in Class.ids.


IF
Global"KR_CLASS_CHANGE","LOCALS",0)< br>THEN
RESPONSE #100
SetGlobal"KR_CLASS_CHANGE","LOCALS",1)
ChangeClass((),FIGHTER)
END

So you first change the class of a character.

274 AddKit(I:Kit*KIT)
This removes the creatures current kit, and then add the specified kit. Abilities from any previous kit are removed.
AddKit(0) will remove a creatures current kit.
Class restrictions apply for kits. When attempting adding an invalid kit, the existing kit (if any) will be replied.

And then you should change the kit and the abilities.
But what does it mean by "Class restrictions apply"? Ability scores? That you can't add a wizardslayer kit to a thief? Or true class restrictions, including race?