wine users - Jul 2011 - Adding a Registry Key to Wine

How do I add this registry key to wine: 

[HKEY_CURRENT_USER\Software\Wine\Direct3D]
"UseGLSL"="disabled"

As it says to do at
http://appdb.winehq.org/objectManager.php?sClass=version&iId=9432? In order
to get Portal 1 working. When I open HKEY_CURRENT_USER\Software\Wine in regedit
there is no Direct3D. I tried making a .reg file containing the line
"UseGLSL"="disabled" and then I clicked the import option in
regedit and selected the .reg file but nothing happened. I also tried creating
the folder Direct3D in HKEY_CURRENT_USER\Software\Wine\ and giving the default a
value of "UseGLSL"="disabled" but Portal still crashes when
I make a portal. Does anybody have any ideas?

Any help is greatly appreciated :D

You did well on creating the folder, but you have to create a key in there of
type REG_SZ with the name UseGLSL and, then, you have to give that key the
"disabled" value.

Cheers,
Jorl17