So:
1) Open DSlazy, and open your clean rom in it
2) NDS Unpack
3) Find the database in ...\DSLazy\NDS_UNPACK\data\data
4) Copy it somewhere else and rename it something
5) Open Nintenlord's compressor with LZ77.dll
6) Choose Decompress
7) For input file choose the renamed database
8) For output file, put it in the same folder and give it a name like "database unpacked" or something
9) Open Nightmare.exe
10) Load Module: Character Editor.nmm
11) Open Rom "database unpacked"
Are you somewhere in that process, or through it all and it still wont work?