diff --git a/README b/README
index c459b67..9e3e482 100755
--- a/README
+++ b/README
@@ -1 +1,20 @@
+I threw this together as a quick hack to put my System 6.0.1 floppies onto a
+CD-ROM, since I couldn't figure out how to get mkisofs to create an HFS
+CD-ROM with multiple partitons.  This program creates an Apple-format
+partition table with the specified number of ProDOS and/or HFS partitions. 
+Each partition has its own volume name and size in blocks.  If the first
+partition is a ProDOS partition and has a file named PRODOS, the CD will be
+bootable on a suitably-equipped Apple II.
+
+Floppy images can be created with GSHK or ShrinkIt and expanded into files
+with NuLib.  To create images of hard-disk partitions, make sure your Linux
+kernel includes CONFIG_MAC_PARTITION and whatever support is needed to
+access your hard drive (probably CONFIG_SCSI, CONFIG_BLK_DEV_SD, and the
+appropriate SCSI low-level driver), move the drive from your II to your
+Linux box, and dd the appropriate /dev/sdwhatever into a file.
+
+Once you've created the partition table, you just cat the generated
+partition table and the filesystem images together in the order they were
+specified when the table was generated.
+
 Read ptbl.c for documentation (build instructions and usage).