The word document provided gives you all the information I'm on about but I'll tell you briefly. When I try and update GTA 4 to 1.0.7.0 to use LCPDFR 1.0d I get given half a dozens errors and I've tried everything to fix them but I haven't managed to do so.

Are you using this patch? http://support.rockstargames.com/entries/484496-Grand-Theft-Auto-IV-Patch-7-Title-Update-v-1-0-7-0-English-1-0-6-1-Russian-1-0-5-2-Japanese-

No the English version

That's the one I linked. It's multi-language. It looks like you are updating GFWL, not GTA IV. Here's the link again: http://support.rockstargames.com/entries/484496-Grand-Theft-Auto-IV-Patch-7-Title-Update-v-1-0-7-0-English-1-0-6-1-Russian-1-0-5-2-Japanese-

Still get the errors

And you're running the file that I linked you? 

Yeah it gives me a message saying 'The installer has encountered an unexpected error installing this package. This may indicate a problem with this package. The error code is 2755.'

Alright then. Looks like this is something you'll have to contact the Microsoft / Rockstar support about.