You have to RIGHT-CLICK on the link, using the standard Windows convention for downloading and saving a file. Your standard browser will pop up a "Save File As" dialog. As described on the referenced page, save the file within the "terrains" folder of your Aces High II installation. In most cases with older Aces High software, that means you'll be storing this file at
c:\Program Files\HTC\Aces High II\ahiiterr\solomonc.res
With newer versions of Aces High software, you'll be storing this file at
c:\Hitech Creations\Aces High\ahiiterr\solomonc.res
I hope this helps.