Dear Lomax,
it is possible to implement ABS and CRE in our simulator.
For CRE, you have to adapt the sector assignment (see https://www.nt.tuwien.ac.at/research/mobile-communications/forums/topic/enodeb-selection-in-hetnet-mode/)
To use ABS, you would have to implement a scheduler that is aware of the type of BS it is dealing with and then limit the RBs available for scheduling for macro BS.
Best,
Martin