Can anyone with experience / knowledge of this help. I bought a PR5 website (with only 275 indexed pages in google, 1200 in msn) All of these pages are .html files. The site is ugly, old and has outdated content and design. I'm trying to build a new site around the old files without risking the pagerank. I'm thinking of putting adsense in a new header, along with a message that this is the old website, "click 'here' to go to the new homepage" so that this will appear on all old pages. Maybe on the new homepage I'll have an archive tab in the nav column - under which I can have all the main links from the old homepage (to try and have the PR of the homepage unaffected). My question is how do I do all this? How careful do I have to be? Is there a safe way to change all these files to .php files (and include php header code)? What's the safest way to set up redirects so that the indexed pages don't get lost for ever, but simply get updated with the new php files? This is a 10 year old PR5 website and so I'm trying not to ruin what this site has naturally gained - but the thing is so dated it needs to be radically changed - I'm thinking of adding a forum, basing the homepage and site on wordpress, maybe offering people webmail based on the domain. ^can these changes kill the natural PR such a site has gained over the years? For example should I stay away from wordpress? Thanks for any help.