Re: hair extensions ..
Oho, I didn't read the second part... it says you can't even use your own hair which has been removed.
Hmmm... I don't know about this ladies, I would think then makeup and any kind of other araaish is also haram, since you're trying to look prettier than you actually are.
To me, Haram is all that is labelled Haram by Allah in Quran Paak. Hadees ki validity kaafi questionable hoti hai.... then again, har ek ko apna hisaab khud daina hai, so do what you think is right. Juts my two cents :)