I wish I could help you but I know nothing.As HL1 fan I want to say that it's always nice to see more original things being implemented into BM,can't wait to play with Juniez pack and your icons.I also subscribed on your HL1-style ammo pack in workshop.Do you have any plans to implement HL1 style HUD in Black Mesa?
As for the HUD, I feel like the default already does a pretty nice job. My main issue is mostly with the VGUI elements, hence the icons. Really the main differences between the two are the color-balancing / scanlines and fonts. That being said, I have been toying with the idea of replacing the health / armor icons, but all of this is fairly up-in-the-air at the moment.