Upon request, I prepared a guide to flag ESP files as ESL. Why you would want to do this:When flagged as ESL, the files do not count towards the 255 mod limit. Why you might not want to do this:However, only smaller mods can be changed to ESL. Furthermore, mods that are ...
That is for normal esp plugin. For the light plugin like espfe and esl instead of the 4 first it's the 5 first numbers that are used for the load order number and the 3 last for the id in morph.ini. In this case a FE001740 become Charlotte.esp|740=Ripley instead of 1740 in a...