Before an application can be installed, you have to give WarpIN some information which files to install, where to install them, whether to create WPS objects, etc. This is done by entering information on the pages and pressing the "Next" button on the bottom right. You can switch back to the previous page by pressing the "Back" button. What exactly is displayed on these pages depends on what the creator of the archive wanted you to see, so there's no general information we can give you here.
In any case however, after all the information has been gathered, the installation process will begin. WarpIN will then unpack files to your hard disk and configure your system, if necessary: that is, it can modify your CONFIG.SYS file, register and replace WPS classes, and create WPS objects. All this is specified by the archive creator and thus depends on the archive you are installing also.
All changes made to your systems are recorded in the
global database so that they can be fully undone later.