I've written a Lua Widget that may or may not prove to be useful. It's at unknown-files and I can't post a URL due to the anti-spam software on these forums, but you can find it by going to unknown-files then:
Moderator: http://spring.unknown-files.net/file/22 ... oup_icons/
There is an image at the above page.
As I am lazy I am just going to copy and paste what I wrote there:
It's install as per normal: copy into the spring\LuaIU\Widgets folder and be sure to enable LuaUI via the settings.exe program.This widget adds a icon for each unit group (1-9). Single click on an icon to select that group, double click to select that group and move the camera to the group.
It also displays the total health of all units in the group and will flash red when any unit in the group suffers damage. It has a couple of minor bugs, but they don't effect it's use.
It's my first Lau script so the code is most likely going to look pretty crude :)
The script uses functions from scripts by Ray, Trepan and MelTrax in order to do a lot of the drawing, so a lot of thanks needs to go to them.
As this is my first post to this forum, I'd like to add that Spring is just fantastic (I was a bit OTA fan, but this is better

Cheers.