3
That block is already included in Xoops, you will find it in the blocks section, if it's not assigned then you need to select the no assigned option from the drop down:
admin ---> system admin ---> Blocks
In version 2.0.5 of XOOPS you will see a drop down box, by default it will select 'Registered Member' if this block has not been assigned you need to chose the '#unnassigned' option.
Then bassicly edit the block to show it on site as you would with any other block.
Tip: if you ever struggle finding a block you can always goto:
admin ---> system admin ---> groups
If you have a look down that page you will see all the blocks (they are links) as they would appear on xoops, left, center, right, if you find the block you want to edit then click it and you will be taken to the blocks admin so you can set it live.
I hope this is of help.