"Can't Stat" USB install

[smilebot]

Hello, using the Control Panel's USB Install, I receive this error:

Setting up tinycore_current.iso image on /mnt/sda1 ... cp:can't stat '/mnt/staging/boot/tinycore-current.iso.gz': No such file or directory

This PC is booted from a CD containing TC. The TC iso I am using for this USB install is in a directory on the PC's hard drive.

[^thehatsrule^]

What were your entries leading up to this?