I'm not meaning to be a dick by saying this, but is it okay for another person to use sprites ripped from another game made in any of the RPG Maker toolsets? Like the sprites in VH or "Ring of Lust" game. I've thought about using them myself but thought that might go against some copyright or something. >.>
I've played around with RGSS in RPG Maker XP before though I can't really consider myself an expert. Actually I kind of dislike the language as it just seems to hard for me to read, and this is coming from a computer science major. >.< However I think you might be able to show those HUDs that were in the two games you mentioned via events in RPG Maker XP. The developers for RyonaRPG/VH were able to do it in there, so I think it seems possible.
I am interested in seeing how this project turns out. I may be able to help out with the scripting so PM me if your interested. Good luck on the project!