Mini-Roman Album. // Source: scanned by maiyura.
These files are all beneath 100 KB each, so I didn't bother to post file sizes.

Image Cross-References: Daikenkyuu 2 artbook scan (textless!), Animage April and August 2005, Prince Animage volume 01 (below) and volume 02, and a clearfile (textless!).

Source: cover from JPQueen, pages scanned by maiyura and YukinoABC.
Hey, that first page is an old illustration that got recycled.

Image Cross-References
Cover: Daikenkyuu 2 scan (textless!), Animage May 2006 (below; textless!), Prince Animage Volume 01 (below; textless!), Prince Animage Volume 02 (textless!), and a Special Carnival card (also textless!).
Yuuri/Conrad: Daikenkyuu artbook scan (textless!) and Animage November 2004.
Spread illustration: Daikenkyuu 2 artbook scan, Prince Animage volume 02, and a Special Carnival card (all textless!).

Source: scanned by dragynville.
This set of playing cards came with the March 2006 issue of Animage.

Image Cross-References: The image used on the playing card box is reprinted from the December 2005 issue of Animage. (Check the December 2005 entry for more cross-references, including artbook and card scans.) The Spades illustrations can be found on the character design page. You can find the Hearts images pretty much everywhere, I'm far too lazy to cross-reference all of them here, but previous Animage issues, and the Daikenkyuu artbook, would be good places to look.

Image Source: scanned by yzak.
Beware the large file size! You might want to right-click and save this file to your own computer instead of viewing it online.

Image Cross-Reference: Animage May 2006 (scanned below), Prince Animage Volume 02, and a Special Carnival card.

Source: scanned by me, alt scan by Miriallia.

Image Cross-Reference: Side A, Daikenkyuu 2 scan (textless!), Animage March 2006 (above), Prince Animage Volume 01 (below), Prince Animage Volume 02 (textless!), and a Special Carnival card. Side B, Animage April 2006 (scanned above), Prince Animage Volume 02, and a Special Carnival card.

Source: scanned by me.

Image Cross-References:
01) Daikenkyuu 2, Animage May and March 2006 (above), Prince Animage V2, and SC card.
02) Daikenkyuu artbook, and Animage March 2005.
03) Daikenkyuu artbook, Animage June 2004, and a message card.
04) Daikenkyuu 2, Animage December 2005, and a Frontier Works Series IV card.
05) Daikenkyuu 2, Animage April 2005, Animage February 2006 (above), and a clearfile.