I think using a spreadsheet might be the best bet. Then when you have sorted groups you can colour code them on ancestry.
Using the Leeds method just start at the first match and work your way down.
I put all names from the ancestry match list on a spreadsheet, picked the first match, gave them a colour and coloured all shared matches. Then I looked at the second match. If they did not match the first one, they got a second colour and repeat.
Don't try and work anything out at first, not until you are fed up with assigning colours. The issue is that the further down the tree you get the more spread the DNA is so it might look like people aren't related although they really are.
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Toni 
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