There is nothing to buy.. you just have to download the mod... then unzip it... create a shortcut on your desktop eventually..that's all..!!
Really read the doc provided... read rather than want to go faster... and not understand anything it becomes tiring to go around the same subjects without stopping... here on the forum.. in the docs.... everything is clear... it's incredible you ramble like grandpas... the cause: everyone wanting to 'eat' without taking the time to understand..that's the today's internet world...everyone devours videos...faster...faster...but I don't read it's too tiring...then I ask someone like that I have nothing to do. ..lol anything.."LOL"
I add @les green01 if it is to provide this kind of response I would abstain in your place besides your posts here and elsewhere it is the same with you...help stop telling your life story..