newbi question on python rpc server, how it works?

[krishnakant Mane]

hello all,
I have downloaded the entire twisted library.
I am also trying to read the documentation but I have a couple of
problems right now.
firstly, I did not find any thing in twisted documentation that
specifically talks about xml rpc.  am I missing some thing?
secondly, if I am writing an entire application with its logic in an
xml rpc server, do I have to create all my classes as instences of xml
rpc server (just like I create a java servlet or a php script)?  or is
it that I just create one xml rpc server class which is like the entri
point for all other classes in the package?
can you provide a couple of links to howtos or tutorials on creating
xml rpc servers and clients  with twisted python?  I am also confused
as to how will I mix the functionality of MySQLDB with twisted python?
I am asking this because I felt twisted much cleaner to use than the
modules coming with python itself.  again I may be wrong and some one
might point me to the possible problems with this aproach in the long
run.
regards.
Krishnakant.