The installation order for most BackOffice products is at http://www.microsoft.com/ntserver/nts/deployment/planguide/Install.asp.
The Windows NT Option Pack for Windows NT 4.0 (NTOP) requires that you view:
Q195015 Installation Conflicts with Service Pack 4.
Q194113 ErrMsg: Microsoft Internet Explorer 4.0 Setup - Some Services....
Q225307 Script debugger is not installed during SBS 4.5 upgrade if NTOP.
Q194507 Windows NT 4.0 Service Pack 4 Readme.txt File (40-bit).