guys, many thanks.
@kacir: ok, will look up for the various discussions - as for numbers, I definitely have fewer than 200 files in the PB360, probably more like 20 fonts (I have some 106 .ttf files I think, though it is not divisible by four!), and it works like the PB360 (they go into teh font subdirectory) but for some reason the configuration menu does not show all of them (though no instability). Possibly a bug of the new models - I just got the package with the 360, will experiment now