I use the Empower bread mix as well. Unfortunately it only lasts me a week or so as I have a sandwich each day, or some toast on the weekends.
I don't have a breadmaker though, I just use a loaf tin and put it in the oven. I've been using my food processor with a dough attachment to mix it but guess what... the food processor finally cracked it with me and died
Now what to do, it will be interesting!
I saw a lot of different bread mixes when I was in my local health food store last night. I reckon it's better/safer to use one that's pre mixed, then you know it's going to turn out, and you know the calories etc.
Also, I add a pinch or two of sugar to the mix. It makes it rise a lot more!