I tried that "mod" and now I get a blank screen(well I did delete the logo) and my hard disk light stays on forever. This is NOT an upgrade I had MS-DOS 6 and Windows 3.1 on the Fat(I think it's Fat and NOT Fat32) drive before.(and FreeDos before that). This is a sort of eraish-appropriate laptop(IMB Thinkpad 380Z).
UPDATE: Riveted back to the old Disk 1 from an image I took before modifying it.
UPDATE#2: Went to a command prompt though the installer and checked the contents of disk2(which is the one where it freezes, disk2 seems to be ok). Also does not matter if I do the advanced or basic install.
UPADTE#3: Turns out that "mod" is for version 4 and I have version 3, so that's no good.
UPDATE#4: OS/2 has NOT been installed and now their is no sound in DOS, I have seen this before and it's when an OS incorrectly tries to initialize the sound card, so I guess setup was tying to probe hardware and failed, which also often leads to freezing. Latter, I'll try disabling the sound card for now and see if that works. I'll report back here after trying that.