I apologize for not replying to your suggestions (I took a peek at work and forgot to come back). I got out my frost cloth and covered my cabbage with it (prior to that I sprayed my cabbages with dish soap) and then put some sticky tape traps in as well. The suggestions here saved my cabbages and my fellow gardeners were watching to see if it worked (and it did).
Thanks folks......I'm sure they will be doing the same next year (theirs were pretty well ravaged by the cabbage worm before the flea beetles even arrived so they had given up but I'm pretty sure they will all be giving your suggestions a try next year).