The jsp plugin resides in directory: F:\PTC\Windchill_10.0\Windchill\codebase\infoengine\jsp\iSEEK Corp
Are you wanting to do this for testing as you develop a site or just to update with a new version?
The reason I ask is you can set the value of web.xml for development from false to true and then all changed will be instantly live. This should only be used in a pilot environment for testing.
Open web.xml found here: d:\ptc\Windchill_10.0\Windchill\tomcat\instances\instance-8010\conf\web.xml
Then look for the following lines and change the value of false to true:
You will also need to restart the method server but after that you can keep making changes to the .jsp page and they will be live. Also note: if you clear the tomcat cache you will need to set this preference again as the default is false.