Percentage for the progress bar

It is possible that during the installation you can put the percentage of progress?
This feature is still missing although NSIS app is very requested by users on the Internet.

The Windows progressbar does not support this, somebody would have to write a plugin that subclasses and custom paints it...

My spiderbanner plugin supports a custom progress bar, but I don't know if it suits your needs: http://nsis.sourceforge.net/SpiderBanner_plug-in.

I found a plugin for myself is very complicated.
More details about this plugin can be found here: www.aceui.cn

please show an example of SkinEngine

This example is not mine and is taken from the author's website www.wps.cn.