Ha, ha! I was actually commenting on Smarmy Madeline Grimm's work that was posted somewhere above yours.

Building meshes is an entirely separate skill, so don't think that making textures doesn't take as much skill or is not as important (especially as textures are what makes a thing actually look like the thing that was built). The alpha in the pig tails is quite successful (I'm glad someone is going through and trying to get rid of Peggy's favorite bald spot "technique") and from the front they look quite nice. However, it does look like you lost a little bit of detail in the Peggy re-textures (they almost look a little flat), and the back of the hair look a bit messy (ignoring the bit that you haven't been able to cover up there looks like there may be a bit of stretching). The brown hair looks a bit green as well (although that might partly be due to lighting).

I don't use paint.net, so I don't know how much advice I can give you in relation to that. Generally, I would recommend hand painting in some of that finer detail (hair strands and the like using a very small brush) using a darker colour. As well, see if you can add in highlights to give the hair the appearance of having a shine. Plus, use layers as much as you possibly can (I believe that paint.net has them), they will make changing hues about a million times easier.

Some of these things will be hard to fix depending on how it was originally UVed (the weird back of the hair is more than likely attributable to Peggy, and may be hard to fix), so oftentimes it's a matter of doing as much as you can with what you've been given (especially if you don't know how to UV yourself).