Dunno about customized, but for premium membership here you can get a kick-@ss word list that works with ccw, although its in .txt I think so I guess it'll work with anything.
I renamed my existing ccw word list to 'default2', and used the cru one as 'default'. Then, I dug up an old puz that I had all but abandoned after several hours trying to fill, and it autofilled in 2 seconds. Paid for itself on the first click of the button, IMO.
Hope this helps.