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Just moved a WordProcess site over to a new host and skinned it. Found out after the fact that the site had been hacked - the db is clean. I did notice at first there were a lot of 404s being generated, so I setup a script to capture and then return a 410 page gone - and then the plan was to submit them to have them removed from the index - thinking there was a manageable number But, when I looked at Google WebMaster Tools there was over 1,300,000 404 errors  - see attachment. My puny attempt to solve this problem seems to need more of an industrial size solution. My question, is that what would be the best way to deal with this? Not all of the pages are indexed in google - only 637 index but you can only see about 150 in the index. Where bing is another story saying that over 2,700 pages index but only can see about 200. How is this affecting any future rankings - they do not rank well, as I found out because of very slow page load speed and of course the hacks? The link profile looking at Google is OK, and there are no messages in Google Webmaster tools. am5cMz2

Here are the questions: If you replace your top menu with a mega menu - like rei.com, target.com etc - that has dramatically more links and lots of non-optimized testimonials and calls for action, and locate the actual code of the mega menu at the bottom of the HTML , How will this affect your sitelinks? Will this now, make your on-page content more visible and indexable? Or does the Google bott dismiss this as just navigation content? In the past, I've have seen this technique work well, but that was before site links were easier to obtain.  Looking at sites with virtually no navigation on their home pages and good authority, I've seen site links seemingly gleamed from alt attributes.