Several people have asked for a way to find the Resource ID (aka LLS Code) for a given Logos 4 file, because currently you cannot open a book in Logos knowing only its filename (unless that filename happens to be the same as its Resource ID). I don't know of any way to do this in Logos, nor do I think they provide a utility program to determine this or a table of corresponding Resource IDs, filenames, and Titles of books (which would be really helpful, and which we've requested).
In the meantime, I have written a little utility program to do this and have created a wiki page explaining where to download it from and how to use it: http://wiki.logos.com/LLS_Code. (It's linked in from the FAQ page if you forget where it is and ever want to find it again.)
I've debugged it pretty well, but use at your own risk. This is unsupported by Logos. I'll field questions about how to use it if the wiki page isn't sufficient, but I take no responsibility if your computer crashes. It's pretty simple C code though, so I can't imagine it being able to do anything harmful. For those who are curious, I will be happy to show you the C code.
You can email me at (my first name followed by first letter of my last name} at sprynet dot com (no spaces or punctuation in the part before the at sign, and omit the brackets).