I can't register isobuster 1.4 silently, when run it for the first time asks my Serial number, anyone?

http://unattended.MSFN.org/xp/applications...s/isobuster.htm

Before using the following batch commands, please ensure you copied over PSKill at an earlier stage in your batch. You can find PSKill here. Why? Because ISOBuster opens itself at the end of installation, we can use PSKill to kill the opened application.

As you can read you must kill opened isobuster window promted for registration.

nope, tried that, didn't work. I dont have problems installing, the probles is that i can't register it silently with a reg file, is there another way to do it?