Sometimes you just need a file in .msi format. Most silent installs, for example, require that you start with a .msi file instead of a .exe file. Here's a cool tool (written by Thunder-man) that does the conversion for you.
Click to view.
Exe-To-Msi makes it easy to unpack the Altiris SVS Setup file (Software_Virtualization_Agent.exe)
To instal Altiris SVS silent, we need the file "Software_Virtualization_Agent.msi"
With "Exe-To-Msi" we are able to get the setup file simply from the exe.
A free tool to wrap any .exe installer to msi :
Exe to msi converter
There is a site about EXE to MSI Repackaging. It has few articles that describe concepts of the process, so may be useful for someone who is new to this.