niqbal, thanks a lot mate!

even when it wasn't exactly what I had in mind I like it .

Anyway, I draw in paint exactly what I would like to achieve, (keeping the original colors of each theme... as I said, I like the original Nokia N900SMS theme, I just would like to know how to change the position of some items).

In case that interface is possible with the SMS, I would only have to rename the files to use it also in the gmail/ovi/skype conversations?.

Once again, thank you all for your disposition and good will .