That is not true. You cant simply follow the Qur'an and disregard hadith.
The first Hadith were written over 100 years after Mohammed's time. They are a collection of 'stories' written from word of mouth that past down through generations and some idiot Caliph decided to write down. They are continually edited over time by Islamic 'scholars' and despite several Hadith saying first hand that nothing should be followed post Quran, they still are (contradiction much). I converted to Islam and my fiancée is Muslim. One of the fundamental things I decided after a lot of extensive research and talking to many other Muslims was that following anything other than the Quran goes against the very basics of Islam.
The problem is they were only ever meant to be a record of Mohammed's life to supplement the teaching in the Quran to give you a broader understanding. But now in many societies they are considered law and usually turned to before the Quran. Which is wrong on every level and also one of the reasons for such massive divisions between different sections of Islam.
For example, both the Shia and the Sunni have the Qur'an yet they are fundamentally different. The Shia consider some of the Companions to be apostates or kafirs and by that they can disregard maybe 10.000 of ahadeeth. And we both agreed before that the split was political.
But what do we see today? The Shia have legalized prostitution (So called nikah mut'ah) and some of them even consider the Qur'an is corrupt, all because they discarded loads of hadith because they are of the source of people who they claim to be apostates.
Well that's precisely like the sect of Islam I'm reading about now that was well established in the ruling classes of the Moghul's of India. They believed themselves to be direct descendants of Mohammed and even went so far as to ban any marriage out side of their community. But such thinking is also flawed.
In my opinion though I'd much rather rely on the Quran which has under gone minimal changes, certainly in the modern era. The Hadith however are continuously edited which automatically draws a line under them as being largely fabricated.
Here we go...a nice quick thing about it for others:
http://www.bbc.co.uk/religion/religions/islam/subdivisions/sunnishia_1.shtmlNow I personally believe much of that to be very loose history. Mohammed's life story is continuously debated and so is his legacy. Which is why I'd much rather rely on something supposed to be more solid, than something constantly changing. At least in terms of the fundamentals. Regardless of that though my faith is my own and I certainly fall into a little bit of a hole when it comes to being put into groups with other Muslims.