This is covered in the FAQ/Readme thread for FritzBot ET:
http://forums.bots-united.com/showthread.php?t=5072
But basically the answer is No, Fritzbot does not layer with other mods of any kind and probably never will. However, if the mods in question are open source and are not utterly riddiculous or against the general sensibility of Maleficus - then some features of it can theoretically be included/integrated into FritzBot ET at their descretion and in due time.