From the doc: '+Compresses code, data, imports, and resources. +Restructures resource section for better compression. +Merges compressable sections. +Preserves icons and version information. +Removes debug information. +Realigns, rebuilds, and trims PE. +Tight and fast decompressor (Jibz' APLib v0.22) +Calculates correct new checksum. +Preserves file date/time.'
pcshrink.exe