Thanks!!. It's a shame that only a couple of disk images are available. Recently I spotted a pair of PC-6601 disk games in Yahoo Auctions; but it ended being really expensive...
About the above link, let me add another one:
S-OS "Sword" for PC-6601. Cool operating system very popular among japanece machines. From the same page, a CP/M version can be found; but I haven't found a ready-made disk image, you must compile and path your own
About "Sword", if you have the real thing, you can write the image to diskette using the wonderful
SamDisk v3.3. Execute "samdisk sword.d88 A:" and you're done!
I'll try to find the way to transfer tape games to disk. There're a lot of good D88 toolkits to play with.