Hi Jordi,
I have attached qpd.tbz which contains everything you need - just have a look if you can compile it .. you would first need to go and do make clean && make in qpd_SockWidg_QtDesigner directory. if that doesn't work give me a shout.
do you have experience with Qt?
i will certainly make a proper release envtually, for now i'm sorry ..haven't got the time at the moment.
also it was intedned for my personal use .. it works fine once you compile and install the plugin.
qpd_New is a sort of emplate folder. i usually run ./new.csh MyNewProjectName to start a new project ;)
just have a look it this for now ;)
Keep in touch, Cheers :)