Oh yeah I got it.
Linux is case-sensitive. The file the install script looks for is "
HPB_bot_i386.so", whereas the actual file is named "
hpb_bot_
mm_i386.so". Hence the problem.
Rename the file hpb_bot_mm_i386.so in HPB_bot_i386.so and run the installer again
[edit] or download the file again, I've rebuilt the tarball with that bug fixed.