how to creat folder,copy JRE and change in envir* variable.

Hello,

I am developing a installer and for that i required the JRE so instead of installing JRE to system,i want to make a folder locally and copy the required version of jre and can also uninstall it later on.

I want to know how to creat a folder and copy the JRE and which environment variable and registry will change to use this jre folder for my installer.

your early reply will be appreciated.

Cheers,
Anamika