Item description:

I haven't tested this on a different platform yet. This was compiled with VS2010 (C#) and .NET Framework 3.5. So, please report me any bug you may have encountered.

Make sure you put correct numbers into the six text boxes, e.g.

2009 20 02 02 49 35

Don't put one digits, illegal numbers or non-numeric characters,
otherwise the program won't generate for you.

Once generated, copy the hex, open your TROPUSR.DAT with a hex editor and paste the hex underneath the line where it says a trophy ID. E.g:

0x21e0: 00 00 00 1C 00 00 00 01 00 01 10 00 00 00 00 00
0x21f0: 00 XX XX XX XX XX XX XX 00 XX XX XX XX XX XX XX

(1c is a trophy ID)

So paste your hex into these XXs (the first timestamp). Re-save it, overwrite it over your game's old TROPUSR.DAT via the FTP manager. Boot the game and ta-da!

(Note- each trophy ID has two separated timestamps, so I recommend using a newer hex (increased date/time) for the second timestamp.)