http://www.progressivescan.co.uk/interlaced.php
The above URL discusses the advantages of Progressive Scan over Interlaced Scan. Basically Progressive Scan removes the interlace lines by scanning the frame in one go rather than interlacing in two goes (alternate lines).
This particularly suits modern display devices that don't use lines.
As to what PS2 version, I haven't seen the model, but it's likely to be v7 or v8 because it's 39001 /N.
Someone needs to open it up and report what they see.