Invalid System Disk

In an effort to open up space on one of our win98se machines my children
(they go back to school Monday) started to delete things "they" thought were
not needed. I'm not totally sure what it was they deleted but I now have the
following:

The System:
Pentium w/MMX
233 mhz
92 ram
win98se

When I try to boot up we get the following. "Invalid System Disk." I tried
to get it going with a win98 boot disk and read in the help file that if I
saw the error above that I should run "SYS C:" I did this and it reported
back that the "System Transferred". I then shut the computer off (with the
power switch), took out the boot disk, and attempted to restart the computer
only to get this: "c:\" and when attempting in safe mode this: "Windows is
bypassing your startup files". I have also run Scandisk (off of the boot
disk) and it found no errors on "C". Is it possible to get this unit running
again?

Any help would be appreciated,
Robert