I don't have a NetMD player but my understanding is that you can't use NetMD to upload recordings. Nevertheless, you can use the Line Out of the player and the Line In of a PC to capture the recording on the PC (a program called harddisk.exe is free and does a good job of capturing Line In to make WAV, MP3 or OGG files; basic editing and track marking of WAV files can be done with another free program, CD Wave Editor). You can then go ahead and burn your CD.
However, an 80-minute MD takes 80 minutes to upload.