New Horizons - Question

In Re: New Horizons - Mission to Pluto
(link: www.nature.com/news/2006/060116-2.html)
Vehicle will have 'Long Range Telescope` as part of
instrument package.
Sched; jupiter - 2007, Pluto - 2015

It occurs to me that since we will have a high definition,
low light instrument in place at a known distance,the
opportunity will exist for some 'hellofa long baseline`
distance measurement.
Since many of our distance measurements are hierarchially
based on the distance of the Cephied variables, (whose
origional distances were measured by earth orbit parallax),
doesn't this mission offer an opportunity to improve the
accuracy of the whole hierarchy of long distance measurement,
especially as distances are now so signifcant a factor in
cosmology?

Do we know the location of the vehicle with sufficient
accuracy at any given time to make the effort worthwhile?
Would the tasking of the telescope to a few 'star field`
images overload the mission?
Is the whole idea flawed in some way?
Are ya out there Postman?

MadDog

"Experience is the greatest of teachers, but she's expensive! "

.