I set up an rc.local file to load my modem drivers on
boot-up. Howerever I can't get sudo chmod a+rw /dev/modem to work.

# Install Intel Modem Drivers & Set Permissions
sudo chmod a+rw /dev/Modem
sudo chmod a+rw /dev/ttyS2
cd /lib/modules/2.4.20-xfs/kernel/drivers/char
insmod -f 536epcore.o
insmod -f 536ep.o

I thought sudo would work, how would you su + Password -
to chmod a+rw /dev/modem .

I tried chmod 1777 /dev/modem from an terminal, but the sticky bit was gone when I rebooted!

Thanks....