There exist unpackers for PECompact.
Try search for unpecompact2, I think there are two versions. http://www.woodmann.com/collaborative/tools/index.php/UnPECompact2_(MadMickael_version) http://www.woodmann.com/collaborative/tools/index.php/UnPECompact2_(smola_version)
If those doesn't work, you can try generic unpacker such as RL!dePacker, linxerUnpacker, Quick Unpack