Stan Jones 0 Newbie Poster

There is a similar thread recently, but just different enough, that I thought I should start a new thread.

One of my sites has been established for a long time, and most, but not all of the pages in the root www directory are changing to php (and moving to a different directory). Several key pages will remain as .htm, so I can't do a 301 for the whole directory.

I understand how to do a 301 redirect in .htaccess, but I read that this can slow processing down. I don't think this is a problem, except that there are over 200 files that need to be redirected. About a dozen files stay the same.

I believe that the 301 redirect (as opposed to, for example, javascript redirects in a page) are the correct way to maximize retaining search engine results for the change.

Do I need to worry about 200+ files being redirected in .htaccess? Is there a way to enter this in htaccess that is simpler? Can modrewrite do this?

Thanks,

Stan