I created a 4.1 RC 3 package. I saw that the app was looking for fpcalc.exe, but it's not included in your zip file.. I snagged a copy off of http://acoustid.org/chromaprint and included it.. I think most of the usage from a PortableApps.com version would mostly be using the GUI so if it wasn't include it may not be an issue..
The portable package doesn't include any of the platform independent components (fpcalc, mediainfo, 7zip) and thus some optional features won't work (acoustid lookup, mediainfo lookup, archive extract).
JPortable has finally been update to version 8 which allows a Filebot 4.5.x to run on a system without Java installed locally.
FileBot 4.5.3 is now available in a Portable Apps Format.