Well, it's not quite Spanish, it's Romanian(being the Romanian board and all), but both have a latin root.. so good eye for that .
And yes, you're right, using a x1 to x16 riser will do the trick, a powered one be recommended.

Ca sa o zicem si pe romana... da, un riser alimentat x1 la x16 isi va face treaba. De gasit, nu prea gasesti ieftin pe la noi: http://www.okazii.ro/cautare/riser+x1.html?fuzzy=0&autoc=write asta la prima vedere.
Despre ce riser este vorba?