PS script to enumerate 25 OUs, look for 2 groups and pull membersl

Hi all.
I look at this question and know that to you PS experts it's an eay one - but not all of us pick up scripting that easy (I did offer to pay for training via a EE-gig lst year, but nothing really came of it ;0)

So, i have 25 OUs under the UK parent OU. Flat straucture here - all 25 OUs under UK. These OUs have many groups assigned to them. You know the thing, it's got a bit out of contol. What i need is a script that can loop through all 25 OUs looking for 2 groups called 'UKSouth' and UKNorth' and from here do 2 actions. Output the group names to a spreadsheet for each OU where they are found and also record the list of users in those groups. Is this something easily achieveble?
Appreciate your looking thank you.