Thank you, Mark.

The problem in my case is that my model is already UVmapped for most of the domains and it's much better than any projection Carrara can offer. However some domains could really use some fitting and when I use the FitUVs option those domains look great, while the well-mapped ones get messed up :(. Also, when FitUV's tries to fit all domains, it tries to also somewhat keep the relative scaling, and that is something I severely don't need in this case, therefore, I am looking for a piece of software which would let me fit the uvs to the working area without messing up other domains...

Would this be a useful feature to request from DAZ? It seems that the algorithm is already there, it would just need to be apllied to a subset of UV's....