I know this answer is late but if this helps, I got a chance to work on EIC Integration with HCMPF on my current assignment. So can confirm that you can use FPM with EIC, but its not that straight forward as it should seem.
You will need to pass the URL parameters to application ASR_PROCESS_EXECUTE_OVP and the initiator role should be set to 'HREICA'.
Also maintain the process group to categories/sub-categories in IMG under EIC->Application Functions->Activity->Integration with HCMPF
