How do i merge 4 esp files into 1?

I have tried several times to merge 4 "Hidden hideouts of skyrim" esp-files into 1. Each time resulting in something i can't understand. I can't choose my own output folder or filename. Im beign asked about the something about the merge file where i can choose several files like "Skyrim.esm" or "Dawnguard.esm" and so on. When i choose something, nothing seems to be happening. Im just back where i started in Tes5edit.

Im getting real tired of this, and really lost the interest in Tes5edit, since i have no need for it except for the merging of these four files. I simply just want to merge the files, so i can get back to playing the game.

Is there another way of merging esp files without using Tes5edit?
or
could someone do this for me provided i give you the files?

Well, the 4 files i want to merge is the already merged "Hidden Hideouts of Skyrim - Merged" + "Hidden Hideouts of Skyrim City Edition" + the 2 Single Hideouts from the "Hidden Hideouts of Skyrim - DLC". I really know nothing of modding and using either Tes5edit or xedit. I really tried following the instruction given both by the creator of the mods, who actually describes how to merge his mods to one file, and the instruction given both by the Tes5edit and xEdit pages. I watched the video on xEdit page aswell. I just don't get it right anyway, and would not know how to check for they call bad edits and later extracting bsa files as they tell me to...

So i guess my request is if someone who knows what he/she is doing could do it for me, provided i send the 4 mod files i want to merge?

Have you tried extracting all the data in the bsa esp and esm of your mods into a separate folder and then MANUALLY merge them and THEN packing them again?