Item description:

ISO Tool is a homebrew app that lets users�decrypt EBOOT.BIN game files, repack ISOs, patch ISOs, convert ISOs to CSO format, create XMB ISO icons, fake NP data, and more using only their PSP.
This signed version is for use with official firmware.
v1.975 Changelog (Translated):

[BUG] (fake_np conversion) of the original ISO file Fixed: Failed to get to the size
[BUG] (fake_np conversion) and target files of the original ISO was too frozen to the difference in size Akira Osamu
[NEW] (fake_np transformation) since it appears that the dummy block is one problem, several modified to make
[NEW] (fake_np conversion) fake_np re-added to the menu for the data conversion. / data / fake_np / The following folders are created UMD titles
[NEW] (fake_np conversion) fake_np Deha???Ku NP.PBP conversion, changed as the original data folder you specify during the conversion data changed to use the above menu created Special Thanks said to irakusa