Mac OS X Lion &  windows 7

I heard from my friends that we can not run mac os x lion and widows 7 on macbook is it true??
i have currently installed 3 os in my macbook...
preinstalled mac os x which came when i bought macbook and i installed windows 7 and windows 8 ......
So my question is if i upgrade to mac lion os x from mac app store(mac os x),so it will stop booting windows 7 and 8 or i will have any problem to use windows??
can i get bootcamp for lion os to boot windows 7 & 8?

yeah i hope so about windows 8 that apple will provide bootcamp for that....
but lion does not came installed in my macbook pro.
I have Mac OS X 10.6.8 Build 10k549...I updated it using software update..
When i tried to install xcode 4 from mac app store it said 10.6 or later required...and i googled it and found here that you would need lion os x to isntall xcode 4 or higher version..
Though i have not joined IOS developer program so i can`t get xcode 4.2 but i want xcode 4 at now,so i decided to install lion os x, am i right???
i downlaoded lion os x fro mamc app store today and now waiting for review/answers about it.
I want to install lion os x to work xcode for that is my main reason for that...lion os x is available free from apple if you buy any apple computer/laptop after july...so i got it free from mac app store..
shall i install lion os x or not???

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