fobs,
I think you have your answer now with Blue Eagle's IESpell suggestion. I use it for on-line form like this one (the proon text entry window) and it's great.
Out of interest, does your "Works" include MS Word? Mine does and I have always had spell check available on OE6.
I read somewhere that if you have Word installed you get its spell check in OE6 - it kinda migrates.
Cheers
AA