~open to load the bios
~the check boxes enable options, just uncheck them to disable
~boot partion is where the bios looks for the dashboard (useful for XBL compatability so you don't have extra files on the C:)
~file size is, well, file size of the saved image
~extract and pack are leaned more towards developers IMO since it compiles/decompiles the kernels
~RC4 key (not supplied) is for older bioses. newer dual boot ones do not require it
~clip copies the MD5 hash to your clipboard
~colors determine the setting for the X logo, if enabled. i'm not exactly sure of which part is which, so it's pretty much trial and error. i think the default colors give a vague outline of teh sections
oh btw, DO NOT try to modify images that are unknown, dont think its possible though. it'll just be a hosed image