To disable autoshutdown on file size change;
Throw into any generic unpacker - or do it by hand, it's upx. Then open in olly;
0xD2BBC... Just happens to be 863164 (dec), the original size of the upx packed program.
004D9E7C Â . 3D BC2B0D00 Â ÂCMP EAX,0D2BBC
004D9E81 Â > EB 16 Â Â Â Â ÂJMP...