I think this is the most suitable place for this question! ok, one of my sites is having a rebuild from the ground up to make it fully compliant with webstandards and nicer for the user. it was based on an old php script I wrote years ago but this is now outdated. As a result, the site (currently a PR5 homepage and PR 2 and 3 and 0 inner pages) will be a completely new design and layout. The site is position 3 in Google for a major keyword and P1 in Yahoo...I dont want to lose my rankings if at all possible (or not for long because I know I will!) Some content will be the same but essentially, Google and the other search engines will see it as a new site. has anyone here done this before with a pretty established 3 year old site that ranks well? What did you do please to avoid being zapped off the SERP radar please? I was thinking the following: Use same URLs for well ranked pages, if I cant use same URL then 301 redirect the old one to the new one.... and erm..pray I would like to do it one page at a time, but because its a mysql database driven site it is not possible....its all or nothing! All info welcome thanks