There should be another link for a normal zipped gamedata version, after the OS reinstallation I can't locate the old links (or not yet found the proper folder) but check Google, I think you should be able to find that link. (having said that, links may of course change or removed from the servers from time to time, hope this is not the case)
I checked my modding folder, I couldn't locate the required tool for that extension, either. I'll later check the old back ups. But, making a google search, again, may produce some quicker answers.
(You can't get the unpacking protocol from (
that) xrGame.dll, it's used to help/enable the zooming scope in the mod, but it has given complications when used in some other mods, it's not a drop-in DLL that can be used in any mod. Usage and enabling of it in other mods requires several certain hard work necessitating procedures to be performed beforehand.)
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PS: Thread moved to "Mods and Discussions"