yeah in this situation you'll probably have to piece things together and get a simply windows install disk and install windows from that.
In terms of drivers, if you can still run programs on that system, I'd recommend getting some of the following programs to help you identify the hardware. At that point you might be able to locate a manufacturer for certain parts and obtain drivers. My recommendation is to obtain these drivers and store them on a CD or flash drive prior to trying to reinstall windows.
Ok, here's the list of programs:
- HW Monitor (Hardware Monitor)
also if you go to system information tool that is part of administrative tools in control panel (I think) that might give you some very detailed and useless info, but some of it might be useful.