Thanks, guys, for all your help!
Actually, I downloaded the trial version late yesterday, only to discover when I installed it that it won't work with Windows XP. Actually my laptop is Windows 7 (it's my backup and why I'm using this is another story!), but it has issues with connecting to the internet at home (fortunately the Wi-Fi is fine), so I needed first to get Windows 4 onto my desktop, then copy.
No time to buy another laptop, besides, between the holidays, several repairs and this trip, I'm too way over-extended anyway.
Since I need to make this work while I'm traveling, I've got DPP installed. It's what we in college called a "not very elegant solution", another way of saying it's better than nothing.
I've decided that it's best I shoot in RAW + JPEG. That way I get a chance to work immediately on what I've shot each day and still have highest quality files that I'll be able to use one I get back and sort things out.