I contacted Anth and he replied with the following information;
however there is a trick to get this to work , as by default it won't load like version 1.6b , the following attachment has the files need to get it to work;AnthRax wrote: Hey,
this is actually caused by an Engine bug. Any map that depends on Editor.u (there's a few of them, mostly custom maps) will cause this crash if you try to install NPLoader for the first time. I actually implemented a workaround for this bug a few years ago. NPLoader v1.6c should be able to work around this problem... you can grab a copy here (I have no idea where I put the documentation for it though...):
http://utgl.unrealadmin.org/NPLoader/v16c/
Greetings,
anth
maybe be useful to someone