HaloMods "Classic" Read-only Archive

I was looking for some tutorials, and I needed in order to succeed to use entities bsp viewer, however I can't find a bsp viewer in the entity program anywhere. I think I am using the most up to date entity (beta 1.2.1_1-08-6.)
Where can I find the bsp viewer in entity?

The sbsp tag. Then you click on the little + in the top right and hit view bsp.

Thanks