Download the lha's and transfer them to the amiga using a 720 floppy. You mount the crossdos device with
> mount sys:devs/dosdrivers/pc0
And copy the files with
> copy pc0:#? /some/path
I think it might have worked, if my modem hadn't sent 7000000 volts through me, self-destructing in the process. There was smoke coming out the PCMCIA port, for crying out loud...
Anyways, I have activated 720KB PC floppy disks and transferred all my music to my server. Took about 24 hours. Lousy modem.