can't open xxx file

[JackChen]

.xxx files must be decompressed first, you can do that by downloading Unreal Package Decompressor from Gildor.
[/quote]

Thank you for reply!

I had downloads Unreal Package Decompressor
and i exec "decompress.exe -lzo GFxUI.xxx" and get a new file GFxUI.xxx.

But I cant open it via UE Exploer -> File -> Open File,
how can i open it ? please...