Notes for CONFIG.RPT and AUTOEXEC.RPT This setup displays two menus (see the comments at the bottom of CONFIG.RPT) with the second menu customized depending on which item was chosen on the first menu: MANAGER MENU CONFIG MENU QEMM386 Normal Operation Windows Enhanced AS/400 Experimental Config Backups 386MAX Normal Operation Windows Enhanced AS/400 Experimental Config Backups DOS (HIMEM and EMM386) Normal Operation Windows Enhanced Experimental Config None Normal Operation Vanilla 4DOS Vanilla Experimental Config The second level menus are not submenus -- submenus (such as in DOS6) would require repeating everything for each menu. Rather it's just a single second menu in a menu sequence, with conditional menu items and conditional processing depending on the selection in the first menu. This CONFIG.SYS is quite complex, because it's designed to run under MS-DOS and DR DOS which have slightly different syntax and requirements. Ray uses his own dual-boot feature to switch between these two operating systems, and having a single CONFIG.SYS for both avoids having to maintain two versions in parallel. Differences between MS-DOS and DR DOS are handled as follows: DEVICE=BOOT.IF DRDOS rem commands for drdos DEVICE=BOOT.ELSE rem commands for ms/pc-dos DEVICE=BOOT.ENDIF