OH, maybe you mean the cheatcode "waitusb=5"
not sleep, but waitusb=5 or waitusb=10
5 sec works for mine
also, make sure tinycore recognizes your usb name
it might be sda1, sdb1, sdc1, sdd1, sde1, sdf1,
and to find out
boot withthe code "base norestore nolocal superuser"
this will boot you to a console as root
at commandline enter "fdisk -l"
that's a little L
that will tell you usb name
now try mounting it to be sure
so if it's /dev/sdb1
type in
"mount /mnt/sdb1"
if it says that mount point doesn't exist yet
"mkdir /mnt/sdb1"
then "mount /dev/sdb1 /mnt/sdb1"
then do
"ls /mnt/sdb1"
thats a small L and a small S
this will show contents of usb
now that you know the usb name, reboot
"reboot"
then at boot edit boot: line with
restore=sdb1 tce=sdb1 waitusb=5 max_loop=255 xsetup
that should help