How do you avoid multiple copies of the same samples?

[gavspen]

....when converting?

It's ages since I converted a library and I think I once figured this out but now I've forgotten.

When converting, say, the Ultimate String Library, what boxes do you check do get around the fact that Mach 5 copies samples which are shared by more than one preset into several different folders. (One for each aforementioned preset)

This results, of course, in the converted soundbank being several times larger than the disk from which the conversion was made.

Is there a way, or did I dream it?

Gavin