Go to
portal content ->
Portal users ->
Default framework page,
right click and choose edit.

In the editor on the right,
- select masthead iView and choose properties .
- You will find "URL of Help Link"
- You can Key in the new URL for the Help

Wanna compile a section url for me (dummy)
-----------------------------------------------
2009 Aug 13 - http://www.sapabapnotes.blogspot.com/ - link provided by mawarni

2009 Aug 13 - http://www.sapbasisnotes.blogspot.com/ - link provided by mawarni