Well i'll tell you how i flashed my cham with cromwell 2.27 on a 1.0 box.
Use Memorex Cd-rws
if you're using xp, get the bios, and rename it linuxbio (do not put bin at the end because xp already does this).
Make a new folder named dummy
inside dummy, put some movies, music, anything that takes up a lot of space, try to get it to be about 100 MB in size.
Open Nero (I dunno bout other burning software, but this is what i used and it works)
When the wizard comes up, click on CD-ROM Iso.
Go to your chameleon manual from the xodus website and modify nero's settings according to the manual.
When u have modified the settings, click new and you should get your file browsers.
Drag the bios to the ROOT
Drag the Dummy file to the ROOT
Now just hit burn cd and make the speed to a low setting (4x usually)
Burn it.
power up ur box.
wait till the drive opens and put the disc in
close the drive.
The rest is history (hopefully)
Follow JD's guide from then on.
Good Luck
Happy Chameleon owner