The Smart Charger for Li-ion can't be used: http://www.ikelite.c...rt-charger.html
As far I know they are simple NiMH packs with no electronics. So any charge which can charge 6 cell NiMH should work, but I guarantee nothing.
EDIT: You may be can find someone who has taking the battery-pack apart, so you are sure no electronics are inside. See also this topic: http://wetpixel.com/...ic=24457&page=3