I extracted the meshes and textures in CasTextureUnitool.
Then i created a garment of mine on blender. I exported it as a simgeon.
Now i need to merge the textures and simgeom into package, is there any way to do this without tsr workshop,
I can't open tsr workshop.
Is there any way to do it?
If there is any way tell me how to do it, thanks.

You can do this with CasTextureUnitool, there's tutorials on it in the tutorial section.