I have the B-58 from AlphaSim and have flown it exclusively for abt 2 years and I still have some landings that bounce on touchdown. Have you tried looking at the landing movie that is located in the aircraft config file? I should also ask if you have the upgrade for the B-58?
The best advice I can give to you is ;
  1- Do not land with alot of fuel still onboard. 30% or less is much more manageable as the aircraft wiil sink like a rock once airspeed goes under 200 kts
2- You have to stay on the throttle until touchdown. I usually make approaches at 200 - 250 knots while watching the vasis.
3- Fly the aircraft onto the  runway, do not try to finesse your way down, this thing is a beast and you have to have know when to pour on the juice and when to backoff the throttle.
It took me many hours to perfect my procedure for landing and I have heard that from every body that has flown this model, so do not be so hard on yourself and stick with it and once you can land this baby, you will feel prety good. And every other plane will seem so much easier.
Check some B-58 websites and do some reading on this bird and read some of the comments by the guys that flew them. They all comment on the landing as being a challenge on every flight.
I think AlphaSim did a great job in modeling this plane with input from one of the B-58 pilots. It is a great plane to see FSX with at 22 miles a minute.      Hope this helps,  Skip

I also had bought the B-58 for FS-9 and the good news is, it ports over just fine into FSX minus a couple of cockpit panels to the extreme right and left that really have no impact on the flying end.
I probably should have also mentioned this abt the landing of this bird. You can land nose up with a glide slope on the vasis, always on and off the throttles  to maintain over 200knots, or because there are no flaps, you can nose up abt 10 degees and "plow your way to the runway at low altitude with speed as the determining factor as to when you will touchdown. I do believe that is what is represented in the landing movie. Hope this does not confuse you.  Skip

Glad to hear you have had success with the landing part of this model. I was hoping to hear from other members who are familiar with this model and would be able to enlighten me as I definitely do not fly by the book, but the old seat of the pants and that was the way I was finally able to bring her in for a successful landing. And what a great feeling that is. Hope you continue to enjoy the B-58, it is definitely #1 in my hanger.