Well lets see, ther are mulitble ways to do that.
First just download StarDraft, and make a new CWAD. Go to arsanal II and click on Technologies, and right when you enter the box, you will see all of the Terran, Zerg, Protoss Upgrades. look down at the bottom right corner of the box and you will see a retagular box that says "# of Upgrades". Default is 3, well just change all of them to 255. Thats it.