Weight training while Tri training?

I can't seem to find any good info on the BT site, or anywhere else on the web for that matter, for good resistance workout recommendations.

I don't mean just a few weight sessions for tri-specific muscle groups thrown in now and then, but total body 2-3 day/week workouts @30-60 min to maintain the gains I made over the past 4 years and to even continue to add bulk.

I know bulking isn't ideal for a triathlete, but I don't want to give up what sculpting I have, which was gained through low rep high weight sessions.

I had a fitness assessment at my local YMCA (since I've been rather sedentary for the past 6-12 mo) and was talked into using the Techno-Gym circuit machines.
I've never used machines, just did heavy training at home on a bench with Olympic weights doing the core excercises; squats, presses, dips, pull-ups with a isolation thrown in(bicep/tricep, calves, shoulder raises/presses) and of course, heavy resistance ab training 3 days/week.

Any thoughts on what type/frequency/intensity weight training would be best so as not to completely sabotoge my Tri training and burn me out trying to do too much?

Thanks,
you guys (and gals) are great!