Modifying Masthead - Add fields from Infotypes

Hi ,

I need to make some changes on welcome message, in portal.

I already identify the par file that i need to change (com.sap.portal.navigation.masthead), and the JSP file (HeaderiView.jsp).

The questions are:

1- How can i add some fields to the welcome message, with information from Infotypes (R/3)? Can i "control" the connection to the R/3 in this HeaderiView.jsp?

2- Can i acess to the code of "com.sapportals.portal.prt.session.IUserContext", that is imported in HeaderiView.jsp, in order to know which methods this class has and use them?

Thanks in advance,

Regards