Can't install 2.28 patch for Sacred Gold

[mainerunr 0]

So, I happened upon Sacred Gold in Target on the clearance shelf, I had debated about picking it up as my laptop is win7 x64 but for $2.48, figured why not. installed it on my XP machine but cant update it (downloaded the patch but it says the game isnt installed.)

 

I was thinking it may be because there's no way to register it anymore but maybe I'm wrong (and if I am, how to I patch it before moving the folder over to my laptop?)