Some questions around JAHIA templates...

Hi,

I would like to migrate my web site (http://www.rpn.ch) into JAHIA. 

1. I 've read the JAHIA TEMPLATE DEVELOPER GUIDE but I couldn't find out how
to build my site navigation with tag libs. May be I need to use container
list but it's not very clear how to use this fonction... May be I need 
STRUTS TAG library...

2. I would like to know if there is a JSP editor I could use to easy develop
template. Currently, I'm using Eclipse with net.sf.colorer_0.6.0 color
syntax editor. May be there is a better plugin to do this? If there is a
standalone editor, I'm looking for something running under linux, with tag
autocompletion, color syntax and other stuff...

3. Is there a complete and exhaustive HELP documentation about JAHIA TAG
LIB. I was looking for something similar for STRUTS TAG LIB but there is
only HTML tutorial, it's not easy to print... 

4. How do I know the tag lib I need for my application? Can I mix Struts
with JAHIA with JSTL tag libraries?

5. Where are strored portlets templates? 

6. IS it possible to have multiple seet of templates for one site, as a skin
choice?

Tanks for your help.