title: Multiple RewriteConditions: How to chain them before a set of rules?
body: <p><strong>Q1</strong>: How to chain these two conditions making them <em><code>if BOTH A AND B, then proceed...</code></em><br>
  <strong>Q2</strong>: How to make them stick for all the rewriteRules below and not just the first rule?</p>
  
  <pre><code>RewriteCond %{REQUEST_URI} ^IMAGE-.*$      // if filename starts with IMG- and,
  RewriteCond %{REQUEST_FILENAME} !-f        // if file does exist, then proceed:
  RewriteRule Rule1
  RewriteRule Rule2
  RewriteRule Rule3
  
  # -- END IF -- STOP HERE -- #
  </code></pre>