'Welcome.
And, yeah, you have to open the file in Finn's editor if the conversion is to work. After you do the DAT-BASLUS swap in PS2 Save Builder, load the file in the editor, change something, then save it as a PS2 file. Refresher:
Nearly Perfect XBOX-PS2 Conversion Process
1. Download the PS2 Save Builder program.
2. Obtain a legit PS2 roster file.
3. Obtain the targeted XBOX file.
4. Open the ZIP file that is the XBOX roster and find the largest file (may a few directories deep) It will be a .DAT file.
5. Copy that file to any location.
6. Open the PS2 file in Save Builder.
7. You will see a BASLUS file. Rename the .DAT file to whatever the name of the BASLUS file is (remove the .dat extension also)
8. Right click and delete the BASLUS file in Save Builder.
9. Paste the new BASLUS (the old .DAT file) into the spot where the previous file was.
10. Save.
11. Open in Finn's editor and hit OK on the error that pops up.
12. Save.
13. Load with your flash drive and AR Max on the PS2.