hmm i don't know ubb.x
is the x meant as a variable for a versionnumber or does it belong to the name?
you can see a list of converters on vb.com or you can look into our hackDB for converterscripts to see if there is one.
if you don't find one, you should ask on vb.com if there are any possibilities with other converters.
we are not responnsible for that type, we are just for hacks