How to replace or delete an area actor from a preexisting area?

Hello I am trying to replace or delete all the gnolls in the Gnoll Stronghold with remastered versions:

I know how to add creatures into an area via editing an area .baf file but I currently do not know how to remove preexisting creatures from an area via WeiDU.
Also the Gnoll Stronghold has random enemy spawns and I do not know how to edit those with WeiDU. I have searched through https://www.weidu.org/~thebigg/README-WeiDU.html but I am not getting much traction. Can someone please create a working script for WeiDU as an example template on how to replace or delete an actor in a preexisting area?

I know how to add creatures into an area via editing an area .baf file but I currently do not know how to remove preexisting creatures from an area via WeiDU.
Also the Gnoll Stronghold has random enemy spawns and I do not know how to edit those with WeiDU. I have searched through https://www.weidu.org/~thebigg/README-WeiDU.html but I am not getting much traction. Can someone please create a working script for WeiDU as an example template on how to replace or delete an actor in a preexisting area?
0
Comments
To modify an actor : ALTER_AREA_ACTOR
You can also delete spawn points with fj_are_structure with variable fj_delete_mode.
I remastered the gnolls even more! Gnoll Hierarchy: Gnoll -> Gnoll Slasher -> Gnoll Elite -> Gnoll Veteran -> Gnoll Lieutenant -> Gnoll Chieftain!