enumerate columns from subsites

This case is something which I've came back to a few times.
Customer wants to output columns from certain content types from a number of sites.
Its always a hassle to get the correct names of columns so I've built a method to output the values more dynamically.

1. First getFields.ps1 reads columns containg values from a list item, outputs to gridview, chosen values gets saved to customfields.csv
2. Second getSitecontenttypefields.ps1 enumerates all sites on chosen destination and loops all items of specified content types and outputs chosen fields from customfields.ps1 to an object which is saved to a csv-file.