A robots.txt file
alone won't help you get indexed by Live Search. You need to create buzz about your website so that people build links to you naturally. The more lnbound links, the higher the possibility of being indexed and ranked by Live. Having said that, an xml sitemap and a mention of it in your robots.txt should help too.
Look around for free online tools to create a sitemap if your website is not huge. A simple robots.txt file might look as following (can create it using Windows notepad, save it as
robots.txt and upload it in the root of your domain:
User-Agent: *
Allow: /
Sitemap: http://www.yourwebsite.com/sitemap.xml
Hope I helped you a bit
