Really easy!
Boot from the install disk...format hard drive...install complete 3.1.
Clean and shiny.
MAKE a backup!
for the record, I made three partitions dh0, dh1 and and a small dh2. I use dh0 as a system and dh1 as Work. DH2 is a copy of the system. If I get into trouble (all the time)
I just copy dh2 back to dh0.
I also have a cd backup. just in case.
M