Editing within a tag

Hi
I need to split a tag in the ALBUM field. e.g. "Anton Bruckner: Symphony No. 5 in B flat major" needs to become simply "Symphony No. 5 in B flat major". I also need to move the "Anton Bruckner" part of the tag to the COMPOSER field and have it become "Bruckner, Anton"

Any ideas please?

If the separator between Composer and Album is always the : then use an action of the type
"Guess values" (Import tag field) for ALBUM:
Format string: %composer%: %album%

The swapping of the first and last name has to be done in a separate action and my general impression is: don't
There are numerous cases where the swapping leads to strange results, esp. if you have more than one composer. So keeping the name just as it is avoids irritation.
If you still insist:
Replace with regular expression for COMPOSER:
Search string: (.) (.)
Replace string: $2, $1

Begin Action Group Test2015#20150628.Buntobox

Action #1
Actiontype 7: Import tag fields (guess values)
Source format __: %ALBUM%
Guessing pattern: %COMPOSER%: %ALBUM%

Action #2
Actiontype 4: Replace with regular expression
Field ______________: COMPOSER
Regular expression _: ^(.+) (.+)$
Replace matches with: $2, $1

[_] Case sensitive comparison

End Action Group Test2015#20150628.Buntobox (2 Actions)

DD.20150629.0936.CEST

Terrific! Thanks very much for your help!