HDLGameInstaller seems to be the best installer, but even it has limitations (once you go past ~500GB, it might time out too early if your HDD happens to take a little longer to set up the partitions needed for installs). If you use HDLDUMP/HDLDUMB, don't delete games using these installers because they don't properly mark used partitions as 'empty' for later use, so you end up losing that space.

These are just some that I happen to remember off the top of my head. then OPL only sees the last disc copied over because the title gets truncated and WinHiip uses the title to build partition names. Or if you named your ISOs Xenosaga Episode III - Also Sprach Zarathustra (Disc 1) and similarly for disc 2, etc.

For example, if you install Gran Turismo 4, and another game happens to be placed physically between GT4's partitions, GT4 might either fail to load, play, or some of its FMVs will lock up your system. it incorrectly detects the ISO and creates the wrong size partition), fragments your partitions so that one game might reside another game physically on your disk DESPITE having a 'defragment' feature, will 'merge' games whose titles to share the first so-many characters (I forget how many - just think multi-disc games with long titles) so that OPL only sees the last ISO installed, and is just simply outdated. While WinHiip will certainly install games faster - especially if you use a USB3 adapter - I would avoid using it.

Ps2 slim hdl