Dynamic pspell module, and adding new words to the list

Hi there, an internal client of ours requires spell checking in their textarea forms on names of people for searching thousands of records properly. What it needs to be able to do is add new names to the dictionary. The server its on is a few years old, it already has the pspell and aspell libraries and command line tools, its running php4.3.0 urrggh, what i am needing to do is load it as a dynamic module and then use an Ajax service to do the spell checking. The spell checker needs to be able to add names to the dictionary is any of this possible ? Let me know thanks.