Ive just tried to make this happen. I didnt have the slyk hd so I installed it from the dropbox, made it my skin I removed everything said above and it still booted.
I even removed all skins in an attempt to break it but as garf says it just reloads the default skin, regardless if you want it or not.
Could it be the slyk hd skin is outdated, and I got the most up to date one by just installing it - I dunno like im only guessing but I cant make it happen, I tried v5 and it still boots just the same