First of all, Great Vid. I really loved it
Now to the point:
1.7.4 was a beta of a new system for managing and displaying attachments.
The missing commands were a place-holders for extended gui that never really got finished, and the gui graphics were never really added in the release.
The release itself was for the purpose of testing the new system (increasing number of possible combinations of weapon mods)
In the end, I wrote completely new system for displaying hud, and made a new hud for most of the things (not released to public, yet)
And if you have patched it to Full 1.7.4 you'll get GUI for selecting weapons, and again, it does not work well in this particular release.
The cloak mode is, uhhh... bad. I know that. The same thing goes with the sprint "animation" and some other minor issues with rest of NHEV modes.
Besides that, 1.7.4 was never really meant to run on Standalone 0.65, it was built on standalone 0.30 which have slightly different format, and folder structure.
In the conclusion:
Yes, I know that the latest release of mod is broken, but I have no intention of fixing it.
The old code and scripts were so much mess, that I've had to rewrite them, and in the process create new, more efficient system that become base to Crylife:2.
All of the bugs you've mentioned in your video and in the post has been already fixed.
EDIT: And before anyone asks:
no, I won't make "beta" of Crylife:2 any time soon.
First of all, I want to remove all known bugs and then release it for testing.