SOLVED: TDM gone and thus the -usetdm option useless?
http://forums.lotro.com/showthread.php?348362-Thank-You-For-Removing-Tdm!!!
As a side effect, the client now forces a check on the game files. This is preventing a 2nd coy of the game from launching from the same directory, even with the -usetdm option. I'm currently working around this with multiple install directories, but I'd love to get away from that. Are there are other options to do this? Would symlink-ing part of the directory structure work?