Hey there, Lynne!

I'm the Sarah Meg was referring to -- with the Cross Bow! How are you, my bow-bearing sister?? It's nice to have a fellow newbie here....not to mention a fellow bow-machine user! Seriously don't feel wierd about being new and not knowing everything yet...everyone here has been there at some point, and noone judges. I lurked for a while before asking for help/feedback myself, and I've found this group to be really helpful and supportive. My advice is to do as much independent research as you can on your own, and also come here to get support/advice/input, information as well. Definitely check out
this site for a wealth of information about weight training and more. I printed it all out to make sure that I wouldn't miss any information contained in any of her links to another discussion, and it really is an amazing resource. I am also really enjoying a book called
The Body Sculpting Bible for Women, by authors Ville-something and Rivera......you can check it out at Amazon and see you think you'd find it helpful.
I've just started using my Cross Bow -- just assembled it this past weekend -- and I am
loving it! I work out using a combination of the Cross Bow and free weights (in my case, dumbbells) because I'm doing a full body workout 3 days a week (not splits, as Meg was discussing above) and included in that workout are some exercises that just work better with free weights, like, in my case, squats and an stiff-legged deadlifts. I have adapted the exercises in my routine to those of my Cross Bow (which should be equal to your BowFlex, provided you have a lat bar and leg extension.
Does your BowFlex have those on it do you know? I know they don't come standard with your machine, but buyers have the option to get them for additional $$ -- and can you do squats on it? My Cross Bow allows that, but I wanted to do them with free weights instead so that I'd have more resources to set me up for using good form.
As for the cardio and weights on the same day, I'm sure no expert, but I've heard a great deal advising that you do them on alternating days. I would agree with Meg that flip-flopping the cardio (elliptical) with the walking would work out great -- and be more muscle-friendly! Another thing is to change your routine at least slightly so that your body doesn't get too accustomed to the same muscular behavior.....shaking things up sort of keeps your body on it's toes and you continue to reap the benefits of your hard work with less risk of plateauing.
I'll be interested to hear about more about your routine, and just get to know you better! Welcome -- and feel free to give a holler if you feel that I can help in any way!
Best of everything,
Your Sister in Bows......Sarah