Files should include digit after field CardSerialNumber. See below.
I don't understand what you're trying to do. Can you explain any more clearly or give an example?
e.g.
box.001.card.001.CardSerialNumber=01012900555636
should become
box.001.card.001.CardSerialNumber
1=01012900555636
or what?
Also, VSE 6.0 is fairly old so it would probably help if you posted the contents of your help file on regular expressions. In slick 14, none of the available reg expressions allow .* to find zero or more of any character as well as [~ as not matching char set so it's likely that regular expression processing has changed since VSE 6.
Graeme