If you're creating the fields from scratch, you'd need to create each one via Ctrl-F9 in the body of the document, then type whatever text you need between the field braces. It really isn't practical to try to create fields of this complexity through the standard dialogues.

In general, though, I'd recommend against trying to recreate the fields from scratch. Instead, copy the relevant example from the tutorial into your own document, then edit the field names and the formatting to suit your own requirements. You can simply delete any unwanted output mergefields or you can insert new ones, via Mailings|Insert|Mergefield.

You also mention "looking for using more than one data source". If, by that, you mean you want the one mailmerge to pick up data from different data sources, that's not possible.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]