English and Romanised Japanese at same time.

Is there anyway to get both the English and Romanised Japanese dictionarys to work at the same time?

I am writing a book where I need both the English spell checker (6 months it took to get that working) and a Romanised (Japanese using english characters AKA phonetics) Japanese spell checkers to work at the same time. other wise I have to send them to another (win7) laptop to be spell checked.