There's no more official support for No One Lives Forever, but there is still an active fan community. The tools can be found at the link below.However, I think you'll have a hard time converting the files. The ABC models are native only to the LT2 model editor. I know there is a plug-in for Maya4 that will let you import and export them, but it will be difficult to find a copy of Maya4 unless you already have one. There might be plug-ins for newer modeling programs, though, so you should ask the folks in the NOLF community.
I suspect you'll have the same obstacles with the world maps -- the converters that exist are for old software. Again, the NOLF fans were always deeper into modding and might be able to help you further.
All that said, a lot of the screen freezing problems were fixed by Mok's new CSHELL.DLL. Use the Find function, search for 'cshell' and follow the thread.
