**Step 1: Byte-swap**

Using the [[https://github.com/Keitai-Archive/Keitai-Scripts/blob/main/BeforeExtraction/byteswap_2.py|byteswap_2.py script]] from Keitai Archive, create a byteswapped version of the file
<code>python byteswap_2.py D900i_PF48F4400L0ZDQ0-f1.BIN</code>

**Step 2: Assemble**

Using [[https://github.com/irdkwia/various-keitai-assemble/blob/main/assemble_d900i.py|assemble_d900i.py script]] from various-keitai-assemble, process the byteswapped output
<code>python assemble_d900i D900i_PF48F4400L0ZDQ0-f1.BIN_2swapped.bin</code>