Before you search for a download link, you need to understand what ul.cfg actually does.

Newer versions of OPL (1.2.0 Beta +) have experimental exFAT support that removes the need for ul.cfg . However, for maximum compatibility (99% of tutorials), stick to FAT32 + ul.cfg .

If you use OPL v1.2.0 or newer, you can format your USB to . This allows you to drag-and-drop standard ISO files directly into a folder named DVD without needing to split files or use a ul.cfg . If you'd like, I can help you: Convert your ISOs using USBUtil

No. The internal PS2 HDD uses a different partition table (APA) and a file called hdl_setup.elf or a system partition. ul.cfg is exclusively for USB and SMB (network) loading in OPL.