Patch the "tape out" on your Denon amp to the "line in" on your soundcard.
I found that you can record easily with the Roxio program, but n mater how I tried downloading and installing the upgrades, I could never get it to burn the cd. Instead, it would crash and reboot my computer. This is on Windows XP. It worked fineon Windows 95. So I got the Nero that people were raving about when I lurked here lst summer. I can see what they were raving about. In fact, I will rave right along with them. I burned a perect cd the first time I tried. Haven't got the hang of the label maker yet, though.
As far as speakers go, I ue both computr speakers and a pair hooked up to my amp. That way, if I hear distortion through the computer speakers when I play a song bac, but none when I play the record, I know I recorded the record with the volume too high. It sounds silly, but it did allow me to catch a badly recorded record before I could burn it to a disc that I was going to give as gift.
Be prepaed for somiitial frustration, but once you learn what works for you, you will find ths rewarding. You might even start looking for new records to burn.
All the best,