changing dim style

I have a dwg file with 5 dim style and text syle . I want to change some properties like text height font style etc. i know how to do it, but how can i make these changes easly in all other dwgs which has the same text style and dim style

You can fix them using CAD Standard: http://cad-notes.com/2009/09/maintaining-your-cad-standard/

If you don't have the dimstyle in your file yet, you can drag and drop the dimstyle using design center. But if you already have dimstyle with the same name, then AutoCAD will ignore it...