Delphi BPL Cracking...

You don't need to crack the bpl to use the components it has. All you have to do is build your application with Runtime Packages.

You can do that by clicking on the delphi menu:
Project > Options > Packages > Build with Runtime Packages

Once you have enabled the above option make sure you add the bpl you want to use in the corresponding field

[TQN]

I afraid with only a bpl file, we can not build the Delphi app. To build, we need at least a .dcp file (same as import lib in C/C++), and can be with .dcu files. But he did not have any .dcp file or .dcu file because the app only be deliveried with bpl file.
A bpl file is same as dll file, so we can use LoadPackage (a function of Delphi RTL) to load it and uses GetProcAddress to call a alone function.
Best regards,
TQN