If you have RTW gold, you don't need the patch. It's already patched to 1.5. When you install vanilla RTW, go to the options screen. The version running is in the corner of the screen.

Then install EB to the directory that has the RomeTW.exe file. That means that the EB folder needs to be inside of the folder where RomeTW.exe is, as is shown by the screenshot provided by overweightninja.