[Orin]

Hmm, i guess the DVD drive disc reading errors must of been a common thing. My little bro has gone through like 3 XBOX's and all ended up stop reading discs And i gain 3 new hard drives lol but the XBOX hard drive is only 8-10GB. its also not the fastest hard drive around but its good for some extra storage i guess.(like for backups and tests and stuff)
Anyway,
Boot up the XBOX with its hard drive connected. Then unplug the IDE cable(leave power cable connected so it stays on) from the XBOX hard drive and hook it up to your PC (with your PC off, i'd unplug all other hard drives so you won't get confused on which one is the XBOX one... and also you wont have to set any jumpers hopefully.) Then once its hooked up, turn on your PC and boot that floppy and run that program(ATAPWD). Once loaded up, select the hard drive and select Security command set, Set a master password then (something simple and easy like "password" lol) Then "Unlock with master password". turn off PC, turn off XBOX(may have to unplug it...>.>) then hook the hard drive up to your PC and it should work just like any other hard drive!(may have to change around jumpers for master and slave settings).
If it still doesn't work, boot up with floppy again(you can keep hard drive in your PC at this point, no need for rest of XBOX hardware now) and try disable with master password. Reason i say that is cause its been awhile since i used this program and cannot remember if its unlock or disable.