Documentation of contrib modules

Hi,I think I'll have some spare time and I wanted to add some documentation of 
contrib modules as discussed in [1]. Then it was suggested only some of the 
contrib modules should be in the main docbook documentation. IMHO all of them 
(except start-scripts, probably) should be there so they have more exposure. 
I'm sure many PostgreSQL users don't know those contrib modules exist.I'd like to add a new part after Internals called
"ContribModules". Also, 
 
one question it comes to mind when looking at the current README files is if 
compilation & installation instructions should be there or if with a simple 
generic "psql -d dbname -f module.sql" at the part introduction would be 
enough? Would do you think?

[1] http://archives.postgresql.org/pgsql-hackers/2007-01/msg01443.php