USB booting :: How can I keep .dsl files installed past next boot

Been using DSL for a bout a day and I'm every impressed. My current setup is:

DSL installed onto a CF card in a USB reader (/dev/sda1)
Booting from a USB floppy

I know that I can save .dsl files I download into my local directory and back them up to make it paost reboot, but how to I insure that they're loaded on the next time I start DSL? I've tried copying them to /mnt/sda1 with no luck, they just disappear!

Any help is greatly appreciated.

Cool. It looks like I just have to put the .dsl files into the /cdrom directory. Not sure why I couldn't find that on the Wiki before.

original here.