1) The LB6M is different hardware. The Delta switch and the Dell switch use the same hardware.I had no idea this switch can be converted into a Dell 8024F. Is there a detail guide for that?
2) To convert the Delta to a Dell (or vice versa, though I don't know why anyone would want to do that) you'll need a JTAG programmer to overwrite the bootcode. After that, you can load rest of the firmware normally.