If I have the URL of a .pls to add to MythStream, what file would I add it to?

From what I've been able to find, you need to add a row to the MySQL table "streams".

Here's a step by step:

At a command prompt (as root):

Code:
mysql mythconverg

Once you're in the mysql interpreter type (filling in as appropriate):

Code:
INSERT INTO streams VALUES ('Folder', 'Name', 'URL', 'Description', 'Handler');

Then:

Code:
exit

That did it for me. Hope this helps.

Good find, thanks!