Sorry to disagree with another reply but editing the knock-out stage of the CL is very possible. There are a set of offsets for every knock-out round that can easily be edited.
However it's not easy because the offset you need to change to have the fixture played at a neutral venue (in the host country of the final) is PUSH EBX and needs to be changed to PUSH 4 or PUSH 40 and that won't fit so it requires other lines being rewritten to accomodate.
If you tell me what you want I'll post some instructions for you to edit them.