ok so i dropped the "modern contact list" into the skins folder, loaded app. Then went into settings and the skin section--> Message window or contact list and nothing in selected skin drop down. Still shows no skin and can't figure it out. lol. I all ready have my settings and all the way i want them. So not sure about using the portable folder one you have. Even though looking at the file structure it should be setup the same.
If you are on x64 I have a portable installation all setup. Just unzip and place the folder somewhere like your documents or program files. Then create a shortcut to Miranda64.exe in the folder. Skin should be setup and good to go. You just have to go to menu...accounts and setup your chat accounts.