Script adding upgrade source

Still not possible.
As mentioned by macsrwe here: Re: 6.30 released

Not super happy with having had to this manually on ~40 routers yesterday.

Test file: (test.rsc)

:log warning "Attempting import."
/system upgrade upgrade-package-source add address=192.168.1.1 user="admin"
blahblah

:log warning "Import successful!"

Command:

/import test.rsc

You can also see this if you try by making a script.
Code:

/system script
add name="Test" source=":log warning \"Attempting import.\"\r\n/system upgrade upgrade-package-source add address=192.168.1.1 user=\"admin\"\r\npassword\r\n\r\n:log warning \"Import successful!\"\r\n"
run "Test"

See also: http://forum.mikrotik.com/viewtopic.php?f=9&t=24555&p=535221#p535221