Split_WinISO by Chandra
Split_WinISO.exe can also re-make a new .ISO file and convert the large >4GB Install.wim or Install.ESD file(s) into smaller files for you.
It has been written to interface with the Easy2Boot MPI Tool Kit (if it is placed in the MPI folder).
In addition to splitting large .wim/.esd files, it can also add the missing Windows 7 EFI boot file and modify the boot.wim file for automating Windows Setup using XML files (see here for more details).
Load the ISO file and click on CONVERT if the install file is larger than 4GB.
Use the MPI button if you do not want to split the install.wim file.
The latest version is here.
Recommended for Easy2Boot (fastest!) - SanDisk Extreme SDCZ880-128G-G46