I have Windows NT installed on a first partition. On a second partition (HDA5) i installed Linux 6.1 without any problems. Afterwarts i chose to upgrade, so that some new components could be installed, and the installation program hanged after i chose upgrade. I think the upgrade is trying to mount the wrong partition for the upgrade. Both text and GUI have the same result.
This is a known bug with the installer trying to mount the NTFS partitions that you have as ext2, which is not a good thing (tm). You will need to download and make use of the latest boot images on support.redhat.com/errata, as well as the updates disk which is there as well. This will allow you to perform the upgrade.
OK, thanks for helping ne out.