can i build a setup that will overwrite the previouse installation...c# windows applciation..

Question

Hi all,

if i have allready installed a setup and if i try second time ..it says..

"One instance is allready running" .

can we build a setup which should over write the previouse installation of the same setup.

just like an upgrade virsion of a software. ...

i m working in c# windows application.

Plz do help ....if any ve any idea...

regards...