by CaryD » Wed Dec 10, 2008 7:50 pm
I hadn't actually thought about this, so no, not like you'd like. You can set it as the external code editor and then call it up using Edit > Edit with CSE Html Validator (or something like that if it appears differently on your computer).
EDIT: While this would still involve externally opening the CSE program, it does have the advantage of the current file being automatically loaded into CSE.