Great!
As I said just use the forums to store it.
To add an attachment to the forums use the
go advanced button when you post a reply. Then below the edit window will be the
Additional Options section and the
Manage attachment button. That will open a popup window with a
browse and
upload button that you can use to upload a file from your computer. Because it does not permit .pk3 extensions use a .zip extension on your file. This
part of the main wiki has a link to an example zip file you can use for packing. BTW Winrar is easier than winzip for packing the files but programs both do work.
The file naming convention I use is Fritz_<bspname>_<type>M.mm.zip where <bspname> in your case is transmitter, and your chosen <type> is test giving say;
Fritz_transmitter_test0.01.zip (or what ever minor rev number you prefer.)
This convention is not mandatory and even I on rare occasions vary it.
(BTW we prefer the attachments be in posts in the waypoints subforum but again that is not mandatory.)
As for using the filebase I leave that to Mal, crapshoot and the bindlestiff to maintain and don't interfere.
I'll PM you an email of mine in case you can't get the attachment working.