i have found softwindows2 on a 12-year-old cd, and the cd is still readable.

but: the installation is in german.

if you can't find an english installer, you can use this one.

UPDATE:

now i have tested softwindows2.

the installer runs on 68k but it says: "you can install this software, but it needs a PowerPC to run".

then i read the manual, it starts with this line:

"Herzlich willkommen bei SoftWindows, der Software, die das Betreiben von PC-Anwendungen auf dem Power-Macintosh ermöglicht."

which translates to:

"welcome to softwindows, a software that allows running pc-applications on a Power Macintosh".

i could not find any indication that i "only" got the ppc-version, it very much seems that there is no version for 68k Mac.