Which posts? Please link to one so we know which instructions you're trying to follow
If you want to create a toolbar button which goes to a folder:
-
Select Settings > Customize Toolbars
(a Customize window will appear, and your toolbars will look slightly different; ignore the extra window for now, but keep it open) -
Drag the folder to where you want the button on your toolbar
(a button for the folder should appear where you dropped it; you can drag it around if it's not where you want it yet) -
Go to the Customize dialog which opened in step 1, and click OK to save the changes and return to normal.