keyboard layout in kubuntu

[Albert]

did anyone succeed in having the exact same english international keyboard in 
kubuntu as it exists in the macosx? (easy non-english chars with option+e, 
option+u, option+o, option+`, +m for mu, +a for beta... ) ? 

I find such a mac keyboard perfect to type in simultaneously danish, swedish, 
catalan, spanish and english.

If anyone knows about docs on how to edit manually a keyboard layout, please 
let me know, as I would very much like to have it.

Albert