Here is a TR and useful information (maps, routes guides, links, photos) for planning a trip to Aconcagua; you don't need a guide, just a good sense of adventure. This is our story of our trip.
Consider upgrading your browser; You'll need frames, java, and javascript to fully enjoy this and many other websites. They're free from Netscape and MicroSoft. I recommend IE5.5 (no, we're not plugging Bill Gates!) to get all of the stuff we've put in here.