Sorry guys to ask a help on this topic for thousend times, but I'm sitting and read topics since hours during the evening, and cannot found the right form by now and going mad.
What I have is:
Artist: Michael Jackson
Title: This Girl Is Mine (Featuring Will I. Am) (Club Mix)
What I want is:
Artist: Michael Jackson feat. Will I. Am
Title: This Girl Is Mine (Club Mix)
So far I tried this one, but did not make it:
Action: Guess values
Source format: %artist% $regexp(%title%,(.*) \(Featuring\ (.*)\)(.*),(feat. $2) +++ $1$3)
Guessing Pattern: %artist% +++ %title%