Due to mysterious reasons my account was deleted, so I'll just post this again.
I made a program that can pack multiple files into one and another program to unpack those files. This allows for self-extracting programs and utilities, it even can unpack itself!
File packer: AnN7sQNg
File unpacker: 1b2u56ms
My pastebin: Greygraphics
How it works:
Spoiler