This is currently included in the new version of M1A1 (no longer M1A1, now it's really Marathon) and you don't need to download Aleph One to play this (although it still works with it.) Very good, it maintains the smooth, white style from previously before. It is small enough to give us lots of space on the screen, I couldn't ask for more. Bloody brilliant!
This plugin contains the XBLA-style HUD distributed in the Marathon all-in-one download of Aleph One 1.0. It will not work with the native Marathon 1 downloads bundled with Aleph One 1.1 and later. A compatible version may be found in those downloads.