[Product-Developers] adding new fields to catalog and search for them in Smart Folders

[Héctor Velarde]

as some of you already know, I'm working on a product to extend Plone 
news items in order to support some NITF fields; the extender is here:

http://dev.plone.org/collective/browser/nitf4plone/trunk/extender.py

I have 2 questions now:

1. I need this new fields to be searchable, so I added a value of 1 to 
that attribute in my schema; do I have to explicitly add an index type 
to it also? I was checking archetypes fields reference and it's not 
clear for me

2. I need to use those fields to make searches using Smart Folders; is 
this information still valid for Plone 2.5? 
http://plone.org/documentation/how-to/adding-new-fields-to-smart-folders-search

saludos y gracias