[Users] Migrating ovirt-engine to new server

Hi guys, Please could someone assist me. I'm trying to migrate my ovirt-engine(3.1 but very early release) to latest 3.1 on new machine(both Centos 6.3 dreyou repo). After the intial engine-setup I can log into webadmin without a problem. I then imported my DB from the old server (psql -U postgres -d engine -w < /root/dump.sql) and start the ovirt-engine again, but now when try and browse to the webadmin I don't get anything at all, no web page displays at all, I'm guessing that there are lots of additional steps that I'm missing, so perhaps this is normal. I haven't attached any logs etc because I'm fairly certain that I'm missing some vital steps before I can actually log into my system using the new DB. I've changed the hostname of the machine -- previous name was node02.blabla.com and now it's backup.blabla.com does this matter? My guess is the certificates won't work with the DB now, is there any way to get around this, or should I rather just use the same hostname on the new server? I also haven't copied any physical files or configs across yet, which files/folders do I need? I'm using a FC SAN so I'm assuming I won't need to export my VM's, it should just be a matter of detaching my main storage domain and then re-attaching it on the new server? I see when I try and detach from the old server it says "can't export while there are Templates/VM's on the system" must I hit the remove button on each VM on the old system in order to detach and then attach to on the new system? (presume it will only remove the VM's from the old system and not actually delete the VM image?) I'm using no templates, so I'm assuming these don't need to be exported/imported? Sorry for all the questions, any help is greatly appreciated! Regards. Neil Wilson.