extending pgadmin III with custom views for a domain specific applicaiton

Hi,<br />Does anyone have experience implementing custom functionality on top of pgadmin? This is for an internal
corporateapplication to provide some domain specific functionality on top of the database. I thought that it would be a
goodidea to extend the pgadmin interface (which the users are already familiar with) to provide value added domain
specificfunctionality (custom validation, visualization on top of database functionality) instead of writing a separate
GUIapplication. The idea is to extend the object browser to new nodes corresponding to domain specific entities/groups
(modeledas one or more tables/types in the database) and providing custom viewer/editor forms for them.  I looked at
thesource and it has some documentation on adding custom forms. Is this approach recommended? How would it work with
newversions?<br /><br />Thanks,<br />--Kannan.<br /><br />