Poser 7 rigging has a few differences, but I wouldn't call most of these improvements. The Poser 5 Setup Room allows you to select a bone and then target its joint for sizing or moving it. While you can select your bone and see your cursor turn into a target when placed over the  joint in Poser 7, often the bone that actually moves will be some distance away. Other times, the entire object will move, leaving the skeleton behind. (I've often wondered what the point was of allowing you to move the actual object in the Setup Room) You need to rotate your view just right, or hide nearby bones to get at what you want sometimes. 

Another change in Poser 7 is that the inner and outer Falloff Spheres wire frame view has dropped the green and red colors, making both spheres a uniform white. I preferred Poser 5's display as it made things less visually confusing when placing falloff zones. 

One noticable improvement in Poser 7 is that you can name the bones without the Poser 5 glitch that sometimes makes this task next to impossible, but I strongly recommend that you download the phi builder and use it for establishing your figure's skeleton. Both Poser 5 and Poser 7 will crash and crash again if you attempt to draw your bones in the Setup Room. 

Daz Studio currently uses the Poser rigging and there is no way to rig in Daz Studio. Its interpretation of the Poser rigs is sometimes flawed, but not nearly as botched as the Carrara implementation.  

I don't use spheres at the hips since the hip doesn't actually bend. (The hip is deformed by the neighboring parts.) By the way, you don't have to use the spheres in every case. Tweak the red and green extension lines that you'll see when the joint editor is selected for the movement type. By pulling the ends of these lines into the right locations, you can make a limb bend just right and improve the affect the movement has on its parent. These lines can be adjusted when you use the spheres as well, but there are some instances when it's better not to use the spheres. 

I've never seen a morphs-only approach to rigging in Poser. You wouldn't be able to use Poser's manipulation tools for rotating and bending the parts interactively for such a figure and you can forget about Inverse Kinematics. There might be other problems as well. I'd suggest you learn Poser rigging if you want to create Poser figures. 

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