Just to explain:

You've placed the new block within a switch for the usermenu. You have to keep it outside.
If you want to use a switch like <!-- IF S_CUSTOM_SMALL2 --> - it has to be defined somewhere and set to "TRUE". Otherwise it will always be "FALSE" and nothing is displayed.
So just ...

You have to make two separate Blocks in your Blocks folder (just make a copy and rename it). Give them separate names, and include both of them in your portal_body.html ;)

Sorry to tell you that there is nothing tro understand from your explanations.
I did all the steps but nothing is working ...