ZPACK is a program that can (un)shrink a file using LZRW1KH algorithm. The code has been optimized to work with two buffers of 2 kb plus 8kb hash table.

This is its use:

zpack <source> <destination>

for example:

zpack myprog.exe

generate a pack file myprog.zpk

or

zpack myprog.exe myprog.bck

generate a pack file myprog.bck with the desired name and extension.

To unpack:

zpack myprog.zpk myprog.exe


if the target files exist, prompt for overwriting.

Put zpack.exe on COMMANDS on your sd card; in rar archive you can also find source code + makefile.