bootableCF.c writes EOS_DEVELOP to 0x24 (and, of course, like bootable.c, BOOTDISK to 0x40)

it was created for a CardTricks special version for CHDK DSLR developers (CF = compact flash)

it has not produced side effects for me on A620, A630 or ixus70_sd1000.

If you want or need it (maybe for writing to a CF card): 

go into the \CardTricks directory and 

                    rename bootable.exe -> bootable.exe.org (or whatever)

                    rename bootable.exe.cf -> bootable.exe 

EOS_DEVELOP will then be added to bootsector.

source compiled OK for me under Win32 with the free Borland C++ 5.5 commandline compiler 

wim 