1. From the "Thank you DOS for all your stupid limits" department
   we have an enhancement to the -I option to ignore a slice.
   The slice number can be followed by a BSD partition letter
   (e.g., "-I1g") to ignore a BSD partition within a slice.
   Ditto for the -R options which forces raw compression.

2. From the "Gee, I shoulda taken that grinding noise more seriously"
   department we have the -X option to force imagezip to try e(X)tremely
   hard (yeah, yeah, its the only letter I could come up with) to read
   the data off the disk, even faking (zero) data if a read fails after
   10 tries.