There are two options for skinning. The first being the easiest to configure and use...
1. Use Mother's Skinning Knife.
Mother's Skinning Knife - Item - World of Warcraft
Bind this knife to a key then setup a Group in Chimpeon that has a Time Interval Action On setting of say 10000ms (10 seconds) or whatever you like. Now set the associated Action Key/Button setting to the key the knife is bound to. Start Chimpeon. Chimpeon will now use Mother's Skinning Knife every 10 seconds and as such skin any skinable mob within 40 yards. There is a place in Argus where you can position your character between 3 NPCs each of which kill a bat-like creature that is skinable. Just stand there with Chimpeon started and skin these bats without even having to tag them!
2. If you don't have Mother's Skinning Knife then things are a little more complicated. For starters skinable mobs will need to die close to you. You will need to setup a Group with a Time Interval of say 10000ms and have an associated Action that moves the mouse cursor to where the dead mobs normally die (i.e. next to your character) then press the right mouse button to skin them.
For both these options you might also need to implement a Chimpeon Group that loots the mob prior to skinning. This is made very easy if you have access to Loot-a-rang
Loot-A-Rang - Item - World of Warcraft. If you do, do something similar to option 1 above. If not, do something similar to option 2 above.
Setting up Chimpeon for skinning and looting is dead easy. If you're struggling with that then maybe Chimpeon isn't the tool for you.