Upgrade to 64 bit in Linux mint 8?

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http://www.linuxquestions.org – Hi, Im pretty new to Linux, but I know enough to run only Linux mint 8. (I hate windows) But I just noticed yesterday, I have a 64 bit processor, and Im running 32 bit version. The website says that its less stable (The 64 bit), but is it really worse? I find that my processor gets bogged down very easy in my 32 bit. (No freezes though, I love linux:) ) How do I upgrade to 64 bit without reinstalling the OS?Is that even possible? What other solutions could there be? Thanks in advance, (HowTos)