I moved my website from one hosting company to another. How do I get the old webpages out of yahoo?

How long does it take yahoo, msn and/or google to remove the old web pages that produce 404 errors and reindex our website?

I moved my website from one hosting company to another. How do I get the old webpages out of yahoo?
To remove your website from Google, see http://www.google.com/webmasters/remove....





To remove your website from Yahoo!, see http://help.yahoo.com/help/us/ysearch/de...





To remove your website from MSN, see http://search.msn.com.my/docs/siteowner....
Reply:remove it from the search sites database.





but, about copying.. can't you download the files and then upload it on to the new servers?