File hosting service modification

Hello, i have file sharing website , i need modification. Then user clicks download button he gets file, i need to change this that after download button clicked server generate exe file and it should look like extracting wizard or similar so user can choose location(maybe you You will use other techniques). This file must contain download he requested(example pdf ebook). Why i need exe file ? The exe file(extract wizard or whatever) must change IE and Mozilla homepage to mine (ex. [login to view URL]) Server running Centos 5 , file hosting software - Cgi LOWEST BID WILL BE ACCEPTED PLEASE BID WITH ATTENTION, (please PM with small brief what way you will go). p.s sorry for my english :)