Hi Schizo,

you can see the location of assets by clicking on a resource in the [Linked Image] content browser and checking the "source file" property there.

The correct way to mod these is by putting your customized .gr2 file in your own mod (e.g. Data/Public/ShizosMod/Assets/Characters/Lizards/Lizards_Male/SHIZO_Female_Skeleton_A_Body_A.gr2), then opening that mod in the editor and overriding the resource you want to change by changing the source file property on it to your custom model.

Hope this helps!