I am running 4.5.6-33 on Centos 5, 32 bit. According to the documentation I must update my current server and then migrate it, but this only works for 86_64. I have 4.5.7-43 running on a new virtual machine, I just have no idea how to migrate to this machine as "hspc-mn-backup" fails. (which kinda makes sense) So I think I need to install 4.5.6-33 on Centos 6, migrate the database and then upgrade. But I can't find any download links anywhere.