Time for REQUEST-A-SCAN. If you want to nominate a title, but can't scan/find the cover artwork, nominate it as follows:
Request-a-scan: ....
and err.. I'm afraid we did rig google images search for a day or two. neat 
I didn't... I've been checking all funet pics (sorry gaais 
) And came up with this top5:
Ashguine 2 (never seen the game)
Colums (never seen the game)
Haja no fuin (never seen the game)
Hydline II (never seen the game)
Magical kid WIZ (played it some times)
KOEI scans needed (BiFi?)
Request-a-scan: Suikoden
Request-a-scan: Romance of the Three Kingdoms 2
Request-a-scan: Genghis Khan
+ the last game on BiFi's page, the thumbnail looks very good
Can't remember the name of the one that I was mainly after 
Shocky, if you can put the code to the name (so I'm sure I have the right scans, and to update the names on the site) of those KOEI games I'll spam MRC with them
(the codes pop up after you're pointing at one of the covers for a while)