I have been tasked with running a large community web-cafe. All the
pcs run Windows 98, and are being regularly wrecked by malicious
users.

I have managed to reduce the size of 98 to under 100 MB, and I want to
run the PCs from a RAM disk stored on a network server and remove all
permanent/removable storage from the clients. My only sticking point
is how to download the disk image to the clients? All have PXE-enabled
network adapters.

Cheers!