What if I put it on a PC that's hardware was good enough for ShipSim?
Well, I think there is a certain amount of hardware resouces an OS can take, much more so for the older OS like '98. Like Windows Vista 32bit can only read 3 GB of ram.
I think you're going to have search the internet on what hardware '98 can take.
I have no doubt in my mind that VSTEP would have atleast tried it on '98, but for it not to be included in the minimum specs then it's very doubtful it would work, I'm afriad.