There are many organization which do not allow admin rights and also are against installing any sniffing tools. However, fiddler is a very useful tool. It works by extracting in the installer exe with 7zip. However, thats still a trouble or unknown solution for many. It fiddler is also available as portable tool, then browser hooks may not work, rest is fine.
As you noted, Fiddler works just fine via "xcopy" deployment. You can use either 7-Zip to open the installer as if it were a ZIP or you can simply copy the files you installed on a different PC to a USB key or whatever.