You don't use JSGME for every mod there is.
Most mods don't use JSGME.
Only look at JSGME if the mod says something about JSGME.
All you need to do to activate a map is to put them in the Mapmods folder and add the line to the all.ini.
When they say "mods folder" they mean #SAS, #UP#, #DBW, Files, or MODS, depending on what pack or mod activator you use. For you, the "mods folder" is #SAS.