Here are pictures of my S3000XL with cf card inside as hard disk.
I used IO-Data scsi to ide adapter from ebay, Ide to cf adapter, 2gb sandisk card, and some molex cables.
I mounted IDE-to-CF adapter on the bottom by using 3 screws. It fits perfect
I also modded power plug as you can see on the picture to get 5v and 12v.
I have 16 partitions, about 500mb available.