.EXE
extension.
As a result, you can simply double-click on them to have them installed.
Essentially, a self-installing executable is a regular WPI archive with a small executable header which allows the archive to be run by itself.
Depending on whether the archive creator has included WarpIN with the self-installing archive, the archive can thus be installed even if WarpIN is not installed on the system. This can thus save the user from having to install WarpIN separately before archives can be installed.
For details, please refer to the
WarpIN Programmer's Guide and Reference (WPI_PROG.INF
).