What can be improved:
1. left-right horizontal navigation trough game list is slow and annoying when you have big library of games. Is that possible to increase navigation speed after press&hold left/right button?
There's nothing I can do to increase the scrolling sleep but tbh, it already zooms through the list super fast if you hold the directional button down. I can scroll through hundreds of games in a few seconds, the artwork soon catches up when I stop scrolling too. But, if you've got 800 games installed and the game you want is right at the end of the list, then it can take awhile to get there. I recommend keeping your game collection to a reasonable number like 500 games. Also, don't forget that you can add up to 4 shortcuts to games and launch them quickly from the Navigator Menu.
2. you can not rename game in the game list (you have to modify ISO and that breaks checksum). Can PSBBN remember name of the game user gave it?
Yes, you can. Games are scanned for their ID then matched to a title in the database. You can rename games by either editing the database, or editing the info.sys file that can be found in the res folder on the game's launcher partition.
3. you can not have 2 copies/files of ISO of the same game on HDD with the same ID (SLUS-20946 for example). Probably PSBBN use key-value and game-ID as a key so it creates only 1 menu item per each game-ID even when there are multiple ISO with the same game-ID.
Yes, you can. If you have two games with the same ID (mods, hacks, etc), you can give one game a unique ID by renaming the ISO in the old OPL style. e.g. "SLUS_200.01.Tekken Tag Tournament.iso". The ID in the filename will then be used.
4. you can not change icon or disk image for the games in the game list
Yes, you can. Place a PNG file in the PSBBN-Definitive-English-Patch/icons/art folder. The file should be named after the game's ID (e.g. SLUS_200.01.png), it should be 256x256 resolution and 8-bit colour. If a game has missing artwork, and you create the artwork yourself, consider submitting it to the
PSBBN Art Database so everyone can use it.
5. you can not create game collections/folders for user friendly navigation. This is what I expected when I saw PSBBN UI with tiles.
No, you cannot. That's how Sony designed it and there's nothing I can do about that.
6 . you can not exit game by button combination, you have to reboot console
Yes, you can. If you choose OPL as your game launcher, when running a PS2 game, you can exit the game and return to PSBBN by pressing L1 + L2 + R1 + R2 + SELECT + START, you can also turn off the console by pressing L1 + L2 + L3 + R1 + R2 + R3. You can exit PS1 games and return to PSBBN by pressing L1 + SELECT + START
7. slow boot (38 seconds for SSD installation from pressing power button to start menu). Not sure if it's PSBBN related or PS2 itself or my specific configuration (PS2 slim + IDE resurrector + PSBBN)
That's a little slow, but definitely in the ball park when booting directly from an internal drive. You can greatly speed things up by booting from your memory card instead. Install PS2BBL to your memory card, copy osdboot.elf to your memory cards too, set PS2BBL to autoboot osdboot.elf.