goodroi - 12:27 pm on Jul 17, 2008 (gmt 0) good luck
Robots.txt might not be the solution here. I don't know your site configuration but in the past the people that have asked this question were mirroring their robots.txt file on https & http. In that situation blocking anything would block both. You also mention that you are interested in redirecting, you should look into using isapi rewrite. That could resolve both issues for you.