Here you can find very useful tips for optimizing your web site for MSN.
1. With don't use your keywords more than 1 time in the description tag.
2. Try for an overall keyword wt. of the visible body text of less than 6%. Try to achieve minimum 3% where possible.
3. Don't use irrelevant META tags.
4. Keywords in the domain name.
If possible, try to get a domain name which contain your keyword phrase. Or, it should contain your keyword phrase, and the keywords should be separated by hyphens (best option) or underscores.
To make sure that the engines recognize the keyword phrase, try to purchase domain names that separate each keyword with a hyphen (preferable) or an underscore. Most of the engines place added relevancy on keywords found in the domain name.
5. Consider naming this page after your keyword phrase.
Based on all posts I've read to optimizing in Google, Bing, Yahoo and MSN, they are almost similar. You really need to focus on the keyword than any other thing.