Uhh lets see:
1.) Modifying UnrealIRCd in anyway voids your ability to receive support
2.) We do not support modifications made by other people
3.) We will not help you readd a feature to Unreal that we removed
4.) +I is unethical
First off your version of unreal isnt current . Consider 3.2.2b and also Invisibility was removed from unreal for good reasons . I dont think many people will want to help you get it back . The readmes for those files also suggest it is edited source code which is also unsupported on these boards .