Hello @philcolbourn The Rockstor installer is just a kickstart configured and mildly branded generic CentOS 7 installer with very minor modifications like removing the user creation during install. see the rockstor-iso repository for how the iso and installer are created and modified. Note that this repository is still being fleshed out by @suman so it’s worth keeping an eye on it for iso/installer related changes. As your ideas also pertain to upstream it might be an idea to voice them there. If you do and get some changes accepted / merged it would be great if you let this forum know, plus Rockstor would then auto inherit them which is neat.
Sorry I don’t have any hp microservers but they look like really nice bits of kit. You might want to look over at the thread started by @greenwithao who has an HP N54L, not sure what generation though; also in that thread @erixbzh references some bios hacks on their two g7 N54L which might be of interest / relevance.