Depending on the model of server (like an HP ML350G5) the iLO that comes with it supports ISO/connect to local CD/connect to local floppy out-of-the-box. If you need to boot the SP cd when you're remote ensure that you've got an updated ISO of it onsite on something you can get to to remotely via RDP other than the dead server, then hit the iLO IP from that machine's web browser and you're away laughing. We usually ensure that there's at least one spare accessible machine on each site we manage remotely that is capable of being RDP'd into just for this kind of occassion. FWIW ShadowProtect rocks. It'll rock more when they can deal to the 'restore to a smaller disk' hiccup. I just wish you could image & restore a Citrix server that's had its drives remapped...
