[tldoc] english doc tweaks for install-tl-advanced, etc.

[Karl Berry]

Just made these three small changes to the TL doc.  Sorry for the moving
target ...

--- texlive-en.tex	(revision 15001)
+++ texlive-en.tex	(working copy)
@@ -515,6 +515,8 @@
 
 If you are using the net installer, or the \DVD\ installer failed to
 start automatically, double-click \filename{install-tl.bat}.
+For more customization options, e.g. selection of specific package
+collections, run \filename{install-tl-advanced.bat} instead.
 
 You can also start the installer from the command-prompt.  Below,
 \texttt{>} denotes the prompt; user input is \Ucom{\texttt{bold}}.  If
@@ -1511,8 +1513,8 @@
   shouldn't interfere with any system installations of Perl or
   Ghostscript.
 
-\item[PS\_View.] Also installed is PS\_View, a PostScript viewer; see
-  figure~\ref{fig:psview}.
+\item[PS\_View.] Also installed is PS\_View, a PostScript and \acro{PDF}
+  viewer; see figure~\ref{fig:psview}.
 
 \begin{figure}[tb]
 \tlpng{psview}{.6\linewidth}
@@ -1526,6 +1528,9 @@
   the font-creation window.  More information can be found in the
   (highly recommended) on-line help.
 
+\item[TeXworks.]  \TeX{}works is a \TeX-oriented editor with
+  an integrated \acro{PDF} viewer. It comes already preconfigured for \TL.
+
 \item[Command-line tools.] A number of Windows ports of common Unix
   command-line programs are installed along with the usual \TL{}
   binaries. These include \cmdname{gzip}, \cmdname{unzip} and the