Well, I am all set thanks to your timely and accurate information. thank you so much. In case anyone else new to this is reading this thread, here's what I did...
First I followed the Birdseye link you provided. Though the reviews complained frequently on how slow the downloads were, I continued. But when I registered my device, I registered it just as eTrex without linking up with a USB cable. Garmin accepted the registration, however, it would not allow me to purchase the Birdseye product because I had no compatable device.
So then I used your other link to download G-Rastor or something like that and converted my topo from .tif to .kzm, but then my device would not accept it because it said it was too big.
So then I went back to Birdseye and stumbled upon a way to properly register my device and bought the $27 US product and downloaded a small segment of that (but big enough for much of my use this hunting season). It did take quite a while and had some false starts and repairs, but eventually it all got loaded and I am thrilled to see the topo on my GPS! Now I can see from my waypoints last weekend, exactly where I was and where I need to deviate to get to where I truly wanted to go. Happy days!