Thanks,
Sam
Yeah, but there is no need to go to all that length. I guess Skrat is worried about his workers duplicating effort (though his phrasing seems to imply he wants them working on the same block, which would result in duplication, maybe its just a problem of terminology). Anyway it really is not a problem. The pool ensures its workers all get different work, so there is no problem with duplication, and even if you use multiple pools, the chance of duplicate work must be infinitesimal.
I got a good answer to this the other day which may be worth linking to ... https://bitcointalksearch.org/topic/m.2380262