You might also want to look at these existing script add-ins, some of which let you configure multiple columns without editing script code (but still requiring you to understand regexps):
[ul][li]RegExColumns V2[/li]
[li]Columns: No Brackets, Highest Number, Filtered Name[/li]
[li]Custom Column - Custom Text V1.2[/li]
[li]RegexColumnsReloaded (easily add regex columns or any kind of column)[/li][/ul]