Cidider

Novice question: Can I change (by easy way) the default installation folder for one add-on or switchless installation package? For example: 1. I downloaded addon for opera (or firefox or another). 2. Slipstreamed into XP SP2 CD. 3. Run windows setup process. Now opera (or firefox or another) will be silent installed into program files folder during windows installation process. But I want to put opera in another custom dir, for example D:\Internet\Browsers\Opera. Exist a simple way to modify the addon for do that, or I need to rebuild all addon (or make a new one by myself since all of them put all software into program files). All advices are welcome and appreciated. Thx.