With regular iPXE, booting Acronis True Image is fairly straightforward. For example:
sanboot http://1.2.3.4/ti2017.iso
Booting Acronis True Image 2017 with ipxe.efi is also possible. I was not able to boot with an earlier version (2014) as the kernel did not have CONFIG_EFI_STUB enabled.
Copy these files from the licensed Acronis media to your iPXE server:
Use the following to boot:
kernel http://1.2.3.4/kernel64.dat initrd=ramdisk_merged64.dat initrd=dat4.dat edd=off MBRCRCS force_modules=usbhid quiet
initrd http://1.2.3.4/ramdisk_merged64.dat
initrd http://1.2.3.4/dat4.dat
boot
Note: I copied the kernel command line options from /proc/cmdline. The 'quiet' kernel command line option also automatically launches the application. 'edd=off', 'MBRCRCS' and 'force_modules=usbhid' are not required to launch the application but I have not tested the application without these options.