Okay now there are No "mods" available for Prestige Classes, there are some Hakpaks available for certain classes or to make the game Hard Core.
However if you want to have a Good adventure, look up
The Neverwinter Vault and do a search for either Adam Miller <start with his first series, and be amazed what he does with the game once you advance <img src="/ubbthreads/images/graemlins/smile.gif" alt="" /> > or Dave Masons "A Harper's Tale" trilogy, and last but not least have a look at
this Trust me these are GREAT Modules and well worth the money ($0.00) <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" />