Kelly,
The Bold Optima is the only trigger I have used on my M98's. So far I have used 5 of them. Like the previous poster stated, you will have to inlet the stock a little (approx 3/16" x 3/4"). It is fairly easy, just go slow and remove a little at a time and be sure the safety move freely in both directions without binding. I have also found that the bottom of the trigger housing has the head of a rivet that sticks out of the housing about 1/16" or so and contacts the side of the trigger guard next to the trigger opening. A little work with a dremel will fix it. If it contacts, the pressure on it when the screws are tightened will prevent the trigger from working. Also on my last install, I had to widen the trigger opening a little to prevent the trigger from rubbing the side and sticking (the instructions that come with the trigger mention this). you might have to to both of these mods or none, depending on your trigger guard.
As for the the bolt shroud, I have replace all the issue ones with the smooth Sunny Hill variety from Midway. I think it looks better and worth the 35 bucks. I have seen pictures of other rifles with bold triggers with the issue shroud and safety still there, and some with the issue shroud and the safety removed. I would hesitate to totally remove the safety and leave a hole, as a ruptured case might send hot gas through the hole to your eye. I have also thought about tapping the safety hole and putting a screw in there, but never tried it. Some other members here can add input on this issue. My opinion is replace the issue one from an asthetic standpoint.
Moe