For starters, the PB190 maxes out at OS8.1, so you really shouldn't
ask about it in an OSX forum.
To answer your question: You can't make a Mac disk on Dell.
To maybe help: I have an OS8.0 startup disk: Apple's "Disk Tools
for 68K Macs." You have a 68LC040 processor. The "LC" variants
were strange, and it may not work on the 190.
If you'd like, PM me your snail mail address, and I'll send you a copy.