multitasker.fs question

Hi,

I'm building a lib which aims to use multitasker.fs

However, it requires a data stack capacity of 9 bytes or more.

On looking at multitasker.fs, I'm not seeing any obvious constants which 
can extend the per-task data stack size beyond 8 bytes.

What do I need to do to get a data stack size of (say) 10 bytes per 
task, or preferably even have this able to be set in a constant? Is it 
possible?

-- 
Cheers
David