Like a lot of mods it's a matter of trying them out to find a preference.
In Webster's Main folder are three mods to choose from. One for 1.4, 1.5 and lastly one for the PE or Pacific Environment Mod. Keep in mind that the PE one will not work with 1.4, it is only made for 1.5.
In each of the mentioned options there are three choices of mods to pick from ( except for PE where there are four choices ), when choosing only pick
one to put in the Mods Folder with JSGME, then activate
Here is a link from one of the stickies here to assist with Mod Installation:
SH4 Master Thread: Popular Mods, Tools, Technical advice & Tactical tips: Here