[arch-general] Converting to 64

Hi, I recently found that my processor is capable of running 64bit OS (it has the lm flag in /proc/cpuinfo) and I am using 32bit Arch which is turn off I think. How do I convert to 64bit without the format-and-reinstall ? -- Nilesh Govindarajan Facebook: nilesh.gr Twitter: nileshgr Website: www.itech7.com