You can clearly see the ABIT mainboard and the Pentium III processor...
The AGP slot holds an ATi Rage PRO card (one of the cheapest graphics cards you can get), which is connected to the scanconverter (silver box to the very right). Power for the converter is supplied by the PS/2 port, where you can also see an adaptor for the old keyboard. The converted output (RGB NTSC) is connected like this: Red,Green and Blue are directly soldered to RGB-IN of the picture tube's circuit board. H-Sync and V-Sync are both connected to SYNC-IN on the tube's board.
If you experience any problems finding the correct pins drop me a mail or wait until I am in the mood to put a diagram up here ;)

The (only) ISA slot holds the a classic Soundblaster 16 card (also cheap as ...) which is connected to the sound-in pins from the old Yamma-connector using the amplified output.

On the bottom of the two pictures (from left to right) the harddrive (actually an old 10 Gigabyte Samsung IDE-drive), the PC powersupply and a floppy drive can be found.
In the back, the keyboard (normally hidden) is located. One more word on the keyboard: It is very important that it allows you to press 6 keys simultaneously, you can find a tool to check this in the dEfTOOL.zip. It will help you to find and eliminate any so-called KEY-GHOSTING (the keyboard "forgetting" about a pressed key when you hit another one). We used diodes to eliminate it completely, learn how to do this here.