Thank you for purchasing MUSE's IBM version of Castle Wolfenstein. There is a problem on DOS 2.1 (when used with the PC Jr. ONLY ) that may cause the computer to "hang" during keyboard input. The following steps will ensure that you do not have this problem. 1. Make a copy of your DOS 2.1 boot diskette using DISKCOPY (refer to your DOS 2.1 manual for details). 2. While leaving the copy disk in drive B:, insert your supplemental DOS diskette in drive A and type: COPY DEBUG.COM B: 3. After this is complete, remove the supplemental diskette and insert the game diskette into drive A and type: COPY FIXIT.BAT B: COPY INP*. B: 4. Now, put your DOS copy diskette in drive A, simply type: A:FIXIT "Fixit" is a batch file which "fixes" the DOS 2.10 files on the disk in accordance with the procedure outlined by IBM. We recommend the use of this modified DOS 2.1 diskette for all PC jr. operations. 5. Make the game disk bootable as described in the Castle Wolfenstein manual using the modified DOS diskette. After following the above procedure, re-boot or re-power the computer so that the modified copy of DOS is in memory. Now you are ready to scour Castle Wolfenstein in search of the war plans. Happy hunting.... Archived by OldGamesDownload.com on 3rd May, 2020