Cash flow statement

[Kash]

I'm attempting to generate a cash flow statement. The default statement 
that gnucash generates looks nothing like the standard example shown in 
accounting references like this one:
http://en.wikipedia.org/wiki/Cash_flow_statement

I'm assuming that because GnuCash doesn't know which accounts are cash 
and which are non-cash, I need to modify the raw report.

I'm unclear on three things:
1.) Why do some accounts show up in both money in and money out sections 
of the cash flow?

2.) There are three lines that appear in most examples of cash flow 
statements:
Net income
Cash at beginning of period
Cash at end of period
That do not seem to appear in the GnuCash statement. How do I derive 
these lines?

3.) If I remove the non-cash accounts from the GnuCash cash flow, what 
other steps do I need to take to produce an accurate cash flow statement?

I recognize that these questions are partially accounting questions, and 
if I was more familiar with the underlying principles it would be easy 
to build what I want from scratch. If anyone can point me to a gnucash 
specific  instruction page, that would be very helpful.