Hey jack4star,
You can download Dayz 1.7.7.1 directly from
here.There are two "Dayz versions" of the Namalsk map, 0.741 which you can find
here or 0.75 which you can find
here.
I'm pretty sure the Namalsk related SP mods on this forum use the 0.741 version so that's your best bet.
As for your Red Triangle, have a look
here.
I just had the exact same problem, it turns out some of the CDN servers for DayzCommander are either down or have basically crashed.
What you need to do is have DayZCommander open and flush the DNS on your machine.
To do that, goto the Start Menu and type Command Prompt. Run it as an Administrator
Open DayZ Commander
In the Command prompt, type ipconfig /flushdns
Now attempt to download or update one of the DayZ Mods. Every time you get the error, once again do the command. Each time you will see it will refuse from a different IP Address. keep flushing your DNS until it works, and voila! You'll be downloading DayZ
Hope that helps, if it doesn't, have a look
here.