I am interested in having a go at making making my own clothes for Poser and I was wondering what tools do the people who sell clothes here use?

I found PhilC's plugins (Clothing Designer Modules and Clothing Creator) for Poser, but I can't tell if they are just toys or if they are something a professional would use. Can anyone give me some advice?

I should also mention that I am a Carrara user and I have been told Hexagon is better than Carrara for this sort of thing. Is that correct?