I'd like to share my experience installing Vicibox 4 on a Dell 1850. There were several issues I think I should make people aware of. It certainly wasn't a simple case of 'install and go'.
1) After using the preload CD the system was unbootable due to the installed initramfs missing the megaraid* modules for the LSI based PERC raid control present in the Dell server. Reading the forums this doesn't seem like an issue isolated to Vicibox 4. Anyway, to fix this I booted up the installed system using SystemRescueCD and ran 'yast sysconfig' then search for 'INITRD_MODULES' and add the required modules (megaraid_mm and megaraid_box) to the configuration option. Saving these settings in yast causes a rebuild of the initramfs with the right modules for the raid card makes the system bootable.
2) I originally chose to use the 64bit install for this server as it has 8Gb of ram however asterisk would crash with an illegal instruction error. I'm guessing the binaries for the 64bit version were compiled with some flags my CPUs don't like (They are the older Intel Tusla Xeon cores). I didn't have time to recompile asterisk so I just opted to use the 32bit install with PAE instead. This obviously worked fine.
3) I had the same issue as described by other people on the forums where auto dials would not be put in the meetme conferences with the agents. As discussed on the other thread replacing the 'agi-VDAD_ALL_outbound.agi' with the version from my 2.4 install fixed the issue. Additionally transferring calls to closers was also failing until I replaced 'agi-VDAD_ALL_inbound.agi' with the 2.4 version.
4) I had the usual issue (happens with Vbox3) with my carrier (Orbtalk in the UK) where auto calls would hangup as soon as they were put in a meetme conference with an agent. Adding a couple of sip-slience lines to the routing extension fixed that up.