I found a GOOD work-around for what I want.
I dd'ed the hybrid iso TinyCore-7.2.iso to my /dev/sdx with
dd if=$(path_to_isos)/TinyCore/TinyCore-7.2.iso bs=128K of=/dev/sdx oflag=direct
and to clear the partition table
dd bs=1 count=64 if=/dev/zero of=...
I dd'ed the hybrid iso TinyCore-7.2.iso to my /dev/sdx with
dd if=$(path_to_isos)/TinyCore/TinyCore-7.2.iso bs=128K of=/dev/sdx oflag=direct
and to clear the partition table
dd bs=1 count=64 if=/dev/zero of=...