HTML file loading in Adobe Air + ProgressBar?

I am developing an AIR application. In that few reports I am showing. I am using HTML files to show the report.

Action script is preparing/Writing the report contents into a file/

I am using mx.controls.HTML to show the html file. Since the HTML file is little bigger in 512 MB RAM machine ( when I am running the air app)

its taking 95%cpu when the page is getting rendered for a long time. Its making other applications unresponsive.

Would it be possible to show progressbar when the HTML page is rendering?

Regards

Penugonda