Xmodmap Modification? Options

[netog]

Hi.

I have a C1000 with Cacko 1.23 ROM and pdaXqtrom.
In my Cacko ROM I can modify my keyboard mapping using the Keyboard application to have Spanish keyboard. It means mostly: á , é, í, ó, ú and ñ available.

I know I have to modify xmodmap to do it in X11. But I don`t know how to do it.
For example: I want Fn + n = ñ , just as the Cacko ROM has.
Fn + 6 = á
Fn +7 = é

Any help?

Thanks a lot in advance.

Neto