Excellent video... thanks for posting it. Interesting to see the IR 'points' logos on the side of the second Craven. Can't remember seeing that before.
Some photos here from when I visited Dunsandle (and Moyasta) in 2010: http://www.flickr.com/photos/garfieldsghost/sets/72157625515951567/
Looks like no work has been undertaken on the stock since then...
Well known railway photographer Brian Solomon has posted a couple of entries on his blog with images from some of his visits here:
* Sperry Train at Islandbridge Junction
* Looking back on Irish railways 1998-2003
Looking forward to seeing the revised trackplan!
I'd use timber-sleepered tracks in those sidings, especially the freight ones, as sidings don't tend to get relayed too often.
As a guide, Atlas RS-11s seem to go for around $90 on eBay, which works out at €72/£57. That's for the undecorated version, though... not sure if the painted locos are more expensive.