Cycle between all open windows, with non US keyboard

It was not evident to me but cycling between open windows using

Command-Tab, cycles between applications.

To cycle between open windows of the same application there is another key mapping:

Command-`

But on non-english keyboards this is very uncomfortable.

I changed it to

Command-º

º is on the same place as ` in my spanish keyboard.

System preferences > Keyboard & Mouse > Keyboard Shortcuts > Keyboard Navigation > Move focus to next window in active application

Sources:

http://www.macworld.com/article/60444/2007/10/windowcycle.html

http://homepage.mac.com/frakes/MOSXPT/content/keyboard.html