[Typo3] Question on "Modern Template Building" tutorial (css_styled_content)

[Wes Rood]

Hello!

I'm going through the tutorial, and I'm into the section where the 
template is modified to actually show the page content:
http://typo3.org/documentation/document-library/doc_tut_templselect/Inserting_page_conte/

Where it instructs me to install the css_styled_content extension, I see 
that that extension is already installed, though doesn't appear to be 
the latest version when it consults the online extension repository.

Frontend
        CSS styled content     css_styled_content     0.2.2     0.1.0 
    Global         3.8.0-dev     5.0.1     158 K/62 K     29483/11675 
    Beta     cms

While the tutorial shows that it's not already installed and says you 
must install it.

If I click the button to update the version, I get an error:
Error: Installation is not allowed in this path (typo3/ext/)

The tutorial has a comment about being written in Jan 04, so maybe 
things have changed since then.

So I don't know what to do next.  I'd like to be able to get the body 
text into my template.  Can anyone help?

Thank you !