FOR ORIGINAL INSTALL
http://danika.jukor.net/opera1063win95.html

Install Opera using the classic installer
Download UPX in order to uncompress opera.dll
Extract opera.dll using UPX
Open opera.exe in a hex editor (such as XVI32), change references to "DuplicateTokenEx" to "DuplicateToken" (95 ONLY)
Open opera.dll in a hex editor, change references to "InterlockedCompareExchange" to "InterlockedExchange" and "GlobalMemoryStatusEx" to "GlobalMemoryStatus" (95 and NT4)
Note: add null characters in order to terminate the string and maintain its original length
Optional: Recompress opera.dll using UPX (not required, but recommended)