OK, I think I have wrapped my head around this a little better.
Step 1: Create a Custom HTML field. Under Parameters, set Prepare Content to Yes. Add some HTML to "Description"... my case I simply added <p>Hello World</p> (As a test I added to see on registration, and I can see it on registration form).
Step 2: Add [cb:userfield field="FIELD_NAME" /] to CB_Forum > Parameters > Sidebar... in my case, [cb:userfield field="cb_customgallery" /]
Step 3: Check Forum Sidebar, it should be there.
It's not. I can see it on the registration, but not on the sidebar.
If I use another field, say [cb:userfield field="cb_gender"/] which is a single select list, or [cb:userfield field="avatar"/], they work fine. But no Custom HTML works.
Suggestions?
Thanks,
Ryan