I give it a go for you and then I will post a couple of images to show what I was talking about.

1. You have the right answer. Basic only works with V4 and M3 and only with DS, unless you want to dick around with resizing. Now that was what I remember from the original threads at Daz. The Pro works with pretty much any figure and Poser. You do have to export the figure's head that you want to use without the eyes to use in Facshop first for poser use. The larger textures make for better textures but you will still need to use your favorite paint app to do some post for better results.

2. I would think so but buy at Daz and I think it's 40% off there and you have the 30 day moneyback garantee. You don't get that here.

3/4. No I have not tried animal heads, yet. But I have tried using V3 with an animal image and it worked to a point. Again,I would chalk that up to learning some tricks. I have tested 2d/Anime images to see how that works with good results. So it is a matter of the learning curve again.

5. I can't say but They  keep pointing out how the SR1 is Free, that I have a feeling that the new version will cost. So it is your choice if you buy now or not. But as I stated earlier, buying from Daz is like having a demo for 30 days.

6. This one took about 20 minutes total, with post and P7 Morph Brush to smooth some of the morph out. Not purfect but looks good all the same.