There's _waaaay_ too much screwing-around going on here. There's nothing special about this machine and nothing difficult about the WPI-based driver install that would warrant it.
If two drivers don't load while the rest do, then maybe they're backlevel or there's more than one copy along the search path (said path is \, \OS2, and \OS2\BOOT in that order). If that isn't the problem, then run "testlog generic" from a command prompt, fetch the report from your temp directory, and post it here (it's big but that's OK).
BTW... when you upgraded the kernel to 14.104a, did you also update DOSCALL1.DLL? It is in a separate package on the same page where you found the kernel.