For each theme in drupal there stands an own style.css file. Is it possible to integrate PIE generally to all styles in one action?

Regards
Horst

I don't understand your question, but if you're using Drupal you should look at the css3pie drupal plugin - http://drupal.org/project/css3pie/

Add the htc file to sites/all/themes/yourtheme

Make sure when you include it you encapsulate the path with ' (single quotes) behavoir: url('yourtheme/pie.htc');