Increasing root partition

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http://forums.fedoraforum.org – I have Fedora 12 installed on my laptop with Vista as alternate boot. While installing F12, I chose to have my root partition with 4GB. Now I find that almost 99% of this space is used and only about 50 MiB remains free. So whenever I try to update F12 by issuing 'yum update' command it halts citing the error : Insufficient disk space in /. Now, is it possible to increase the size of root partition to, say, 10 GB? Can I do this without disturbing other linux partitions like /home and the windows partitions? (HowTos)