1: copy all from your SD to your PC
2: format your SD via Samsung= Start/settings/memories/SD then clik "format"
3:uncompress"beta512zip" after download and copy all of them to the root of the My Storage.
4: Start haret.exe from the My Storage\o2beta directory and press Run.
Linux will be starting, examining the present partitions on the SD card, and shrink the fat32 partition size with 1024/512 Mbyte ( theoretically without any data loss ) and create a new 1024/512 MByte ext2 partition. When the partition is ready the filesystems will be initialized and ext2.tar.gz on My Storage will be unpacked to the ext3 partition on the SD card; the valid default.txt ( with the correct root= partition inside ) will be put in My Storage - and we are ready, the system rebooting. In the case you have an ext2/3 partition on the device, you can skip the above process and just edit the default.txt CMDLINE line the "root=/dev/mmcblkxpy" x and y values according your partition ( see below) and unpack the ext2.tar.gz to that partition ( linux: tar xzvf ext2.tar.gz -C /path_to_partition_mounted/ ).
5: After the reset start the haret.exe from the root of My Storage, pressing Run our new Android will be starting.