I recently wrote a post about adding items to the popup desktop menu.
The example I used invoked "editor /opt/tcemirror":
https://forum.tinycorelinux.net/index.php/topic,27977.0.htmlAfter thinking about it, I felt could create something nicer for altering /opt/tcemirror.
I decided to use Xdialog and came up with what I feel is a pretty nice interface.
If mirrors.tcz is currently installed, it opens up to this:

The titlebar displays the file name (/opt/tcemirror).
The next line shows the current contents (tcemirror=http://repo.tinycorelinux.net/).
The menu window displays the choices for mirrors.
There's also a help page:

If mirrors.tcz is not currently installed, or you use the
-m option, it opens up to this:

The titlebar displays the file name (/opt/tcemirror).
The next line shows the current contents (tcemirror=http://repo.tinycorelinux.net/).
There is an inputbox where you can manually enter a mirror URL.
There's also a help page:

Since there is a limit of 4 attachments, I will attach the script in the next post.