Uninstaller for Mac OSX Application

[JanakiRam]

Hi All,
      I'm new to installer / uninstaller stuff in Mac OS X. I'm doing a port
of Windows application to Mac.My Application has kext , mac application and
some files in /opt folder.

     I've managed to create an installer using Package Maker in Mac OS X
Tiger. But couldn't find any application which creates Uninstaller for my
application.

     I've googled for it , many blogs say that there is no Uninstaller in
Mac till now. Is it True ?


     My application installer should have an UI which should be similar to
installer and delete the required files in background.

     Can any one provider some pointers for creating uninstaller for my
application.

      Are there any third party freeware/sharewares uninstaller applications
available in Mac OS X.

     Please help me to solve this. Thanks in Advance.

-JanakiRam.