Like actually telling him, to use the following commands:

r_drawviewmodel 1
viewmodel_fov 54

in the Team Fortress 2 console.
If you aren't aware of how you can enter those commands, This following TF2 wiki page should help you further.
You can also, do it in your "autoexec.cfg" or more in the custom.cfg like I've detailed you earlier.

First, Update your mastercomfig, for god sake.
Also, According to one of the latest closed issues (On a really really more recent version of it):

r_drawviewmodel 1
viewmodel_fov 54

Simply add this commands to your custom.cfg (Well, After you've updated your config, The custom commands system has changed since your actual version if I'm saying right.)
Also, If you doubt that's an issue with the config, It would have been nice to actually report it in the config thread.

Third HUD update suggestion: This concept HUD made by _Kermit on a HUD concept imagined by Rawrsor Here's the current look of the HUD, despite the classically broken strings on the default main menu. Here's some of what it used to look like, along with the HUD download for it.

Thanks again for the work you've done. I will try to fix it myself for personal use once I get more time from my work.

I think according to what you've said, that you're at the second step from here.
Choose the configuration that you want, and place them all in your custom Team Fortress 2 folder. As simple as that! (And it will be even easier once the 7th version finally sort out of his pre-release state)

KatawaHUD https://gamebanana.com/guis/28154
Interested to maybe see this HUD updated as well, It doesn't have any external edited HUD elements like the main menu for example. It's especially for the style of placement of these elements in a vanilla style that's interested me, meaning I completely don't care for the custom arts that won't be able to be loaded on some sv_pure settings.

My .cfg script his not executed in the game like it should be.
I'll explain.
For example, In my medic.cfg, I have a command that says "crosshair_medic.cgf exec".
However, When play medic, the"crosshair_medic.cgf" is not executed at all, Why?
The strange thing is that it detects all the commands that are inside the .cfg file, with the exception of the "crosshair_medic.cgf exec" & the command "slot2" (Because I like to start with the medigun, right off the bat).
For the "slot2", I've written this command at the beginning of the medic.cfg, it worked before, but not anymore...
I've already tried to manually execute the medic.cfg via "exec medic.cfg", but only both of these commands still don't work, Someone can help me? Please ?

Also, For you Blitz62, Make sure it's "exec crosshair_medic.cfg", not "crosshair_medic.cgf exec".
Sharing your actual .cfg file would be useful to help you further more.

Could you update SolanoHUD? Here's the link with the download, Video preview and all the screenshot that you would want. https://sourceforge.net/projects/solanohud/