Hi gera229:
Here's some links straight to three images on Flickr - these are the original size. I was in too much of a hurry to post them here (not having uploaded things here before).
1. Front panel header with ATX switch lead plugged in. Standby power LED is lit (although camera flash obscures this a bit)
http://www.flickr.com/photos/alex1n/7446800986/sizes/o/in/photostream;
2. The Mini-Box Pico150 (150W) 24+4-pin PSU plugged into the D525MW's ATX socket; "P4" connector likewise plugged into the CPU's power socket
http://www.flickr.com/photos/alex1n/7446802880/sizes/o/in/photostream/;
3. General overview
http://www.flickr.com/photos/alex1n/7446804968/sizes/o/in/photostream/.
Note that the SSD and the memory have been disconnected in these snaps, but were installed during failed attempts to get the board cranked up.
I'm currently reading the board's manual *gasp*

.
Another couple of notes: the three-pin CPU fan taken from the old machine (a PII chip) runs when the power is connected; an LED from the old machine lights up (steady glow, no flash-sequences) when plugged into the front panel header (pins 1 & 2).