here is what I have in my toolbox (Score 3, Interesting)

8x dvd drive
2 nic cards
1 pci video card (5 dollar card for testing)
1 pci modem
rj45 crimper
rj45 ends
2 case fans
2 different types of heat sinks (nothing expensive)
any other old computer parts could help (old processors for fixing older computers)
different types of old ram if your like me you have tons laying around

1 dvd-r that includes windows OS's dos 6 all the way to windows xp (this disk is also bootable win98)
all windows patchs

1 dvd-r with all the rest of the utilities witch include
zipping programs
Browsers
burning software (nero with neros virtual drive)
drive imaging (drive image 2002)
Partition Magic Pro 7
drivers for the nic cards (in the toolbox)
drivers for the video card (in the toolbox)
drivers for the modem (in the toolbox)
ftp software
webpage design software
testing utilities (memory testing, fix it utilities)
ad busters (ad-ware, lsp fix)
virus scanners
other person programs will also fit on the dvd-r

a bootable win98 floppy disk incase the dvd doesnt boot on older systems

with everything here should be able to fix almost any problem or at least get to the bottom of it