I have been struggling with trying to edit my .htaccess file. I have Godaddy's Linux shared hosting and am using a Frontpage php ecommercetemplates.com template which the creators say doesn't require leaving the extensions on. However, every time I turn off the extensions my ranking/position in Yahoo falls from 75 to 757. I believe that the spiders cannot properly crawl my site without the extensions is why this is happening. Everytime I edit the .htaccess file and upload it to the server it kills the FP extensions. This is really big problem for me as Google doesn't currently have a single keyword in the 1000s for me and I have been out almost a year.