NOTE: during the HPI File Packer phase of creating the monolithic file, the HPI Pack program lists all the files that it is packing into a window as they go by.
This list should fly past very quickly.
If it does not go very fast, you may be in for an extremely long packing process. However, if you bring up another fullsize window (like Windows Explorer) in front of the packer until it finishes, it goes MUCH faster!