doc: Update the download page for USB installer.

wiki/src/download.html

@@ -188,14 +188,13 @@ share it without restriction.</strong>
 
 	<h1 class="bullet-number-four">Burn a CD or install onto a USB stick</h1>
 
-	<p>Every ISO image we ship can be either burn on a CD or installed onto a USB stick.</p>
-
 	<h2>Burning a CD</h2>
 	<ul>
 	  <li>CDs are read-only so your Tails can't be altered by a virus or an
 	  attacker.</li>
 	  <li>CDs are cheap but you will need to burn a new CD each time you
-	  will update your Tails version (hint: CD-RW).</li>
+	  will update your Tails version.</li>
+	  <li>You could also use a CD-RW but those are not read-only.</li>
 	</ul>
 
 	<p>For detailed instructions on how to burn an ISO image under Linux,
@@ -214,6 +213,8 @@ share it without restriction.</strong>
 	  <li>An attacker with physical access to your USB stick or through a
 	  virus could alter your Tails.</li>
 	  <li>USB sticks can be reused across Tails versions.</li>
+	  <li>You can store documents in the space left on the USB stick and
+	  use persistence.</li>
 	  <li>USB sticks are smaller to fit in your pocket.</li>
 	  <li>Older computers might not be able to start from a USB stick.</li>
 	  <li>This technique also works for <span
@@ -222,15 +223,8 @@ share it without restriction.</strong>
 	  being altered.</li>
 	</ul>
 
-	<ul>
-	  <li>[[Instructions for Linux|doc/installing_onto_a_usb_stick/linux]]</li>
-	  <li>[[Instructions for Windows|doc/installing_onto_a_usb_stick/windows]]</li>
-	  <li>[[Instructions for Mac|doc/installing_onto_a_usb_stick/mac]]</li>
-	</ul>
-
-	<p><strong>FIXME:</strong> mention Intel-based Mac users
-	sometimes need to upgrade their firmware to get the keyboard
-	working in the syslinux boot menu.</p>
+	<p>[[See the corresponding
+	documentation.|doc/first_steps/usb_installer]]</p>
 
 </div> <!-- #support -->