[iPAQ] bootloader

Hello
I have a smal bootloade problem.
Is there a way to make the bootloader like an .elf file without it beeing a kernel...
I have a little program and I have generated an .elf file, Í have then put it in the filesystem in the linux-ipaq
like /boot/kernel.elf (where kernel.elf is not a linux kernel but a smal program that should toggle some of the led's)
when I try to start it with the boot command like:
boot <partition> <file>
It seems initially seems to like my elf and detect that I want it to end up in 0xa0008000 and some other stuff
but it detect that it is not a "valid linux kernel" and dont start it.

So my question is:
1. Can I make it load&boot anyway.
2. Is there some special mumbo jumbo that I can do to my .elf file so it looks like a kernel?
3. while we are at it ... Is there a way to load a file via ymodem from the bootloade to the filesystem?
Now I have to boot linux and then do a zmodem transfer, every time I want to change kernel.elf file.

-- 
Stefan "Zingo" Andersen   (zingo.org and vectrace.com)