See
http://www.concrete5.org/marketplace/addons/url-director/...

thanx for the link. but I need some steps/tips/point which are important in a Drupal to Concrete 5 migration.

I would guess that the howto (http://www.concrete5.org/documentation/how-tos/developers/concrete5-for-drupal-designers-and-developers-page-building-feat/ ) is something you have already read and stage you have already passed in your C5 development, so no longer relevant.

Scott's url director can be used to make sure that any old url is permanently redirected without upsetting google.

I have not used drupal (apart from a evaluation where I rejected it), but the SEO issues should be similar for any web site migration. My experience is that it has only been relevant for a few key pages and the rest follows.

@John

thank you.I passed over a blog post about 301 redirection with .htaccess. I think this would be effective.

Having been involved in testing URL director on the PRB, it is much easier to use than coding 301's into .htaccess and will output 301 headers, so achieves the same result.

The place where .htaccess rewrites come in useful is when there are massive lists of pages that can be handled with just one regular expression. I believe Scott was looking at ways to handle that with URL Director (the version I tested did not do that and it was one of the suggestions that came from testing).