The Red Hat download is about three CD's worth of image files. On a dial-up modem at optimum speed, you REALLY ARE looking at about 30-plus hours. Ma Bell actually only supports 52,400 baud despite your modem saying that it is 56K. If you are more than 1 1/2 line miles from your telephone exchange, your modem speed will start dropping proportionally. (I know folks who are limited to 33,300 on dial-up because of the distance issue.)
If you must download it, find a friend who has a broadband connection (cable modem or DSL) and a CD burner. (either that or just be VERY patient) Also, some of the mirror sites that have the Red Hat images are faster than others. I have even downloaded Red Hat 7.2 from the NOAA FTP mirror site. The FTP client that you use can make a difference as well.
The Red Hat boxed set with good documentation and support included is only about 50 bucks. You might find it worth it for the additional stuff that you get and the convenience of an OEM product (if you are willing to part with the money).
Happy Hunting
Sleeping Dog