You downloaded
80gb 
WOW!! You must have some connection to grab 80 GIG!! LOL!!
And all cracks are probably from w***z versions, where else would they come from?
I have the US English version of the game hence the difference in file size, it's localised to each region. Your UK version will probably have slightly different spelling or text in the game.
Seeing as you already have the US crack and the UK version I can probably help you make a patch from your UK version, it will turn the UK file into the US one but, as you say it seems to work on the UK version, then who cares
PM if you're interested!