Extracting a .exe file and removing the 'installer.exe'

[GMX]

Ok, I'm not even sure where to start with this one...
I want to make my own 'installer' here's the situation:
-There's a few files to extract (readme.txt, help.txt, and an 'app.exe')
-After the installation is complete I want to launch app.exe and remove the installer.exe
-I don't want app.exe doing the removing.

If you could just point me in the right direction on this.

Thanks in advance!

 

[CodingNovice]

http://www.catch22.org.uk/tuts/selfdel.asp