thanks for posting this.
i have literally hundreds of wallet backups spread through dozens of hard drives. some ltc, some nmc, some btc. all just named "wallet.dat" before i figured i should give them a coin name a part of the name. always dreaded just dropping then into a client and seeing what happens.
this will help big time.
Indeed, it is a pain in the ass when you find a random wallet.dat file somewhere, and you don't know where it belongs, and you start droping the file on a ton of different potential full clients which you remember using back.. it's a mess.
Remember to use a block explorer if an address format is used in various coins, I think other coins also use an L for example, so it may not be Litecoin necessarily, a block explorer will make it clear, at least if it has funds in it.