To perform this step, you must use the Registry Editor. From the Start Menu, choose Run and type or select the program name regedit. The Registry is organized hierarchically, much like the Windows file system. Double-click on each key level to display:
HKEY_LOCAL_MACHINE\SOFTWARE\Lotus\Components\LotusScriptExtensions\2.0
Choose Edit New String Value. For the name, type SOLVER (this must be all capitals). For the value, type the complete path to the Solver DLL, such as c:\lotus\123\solver\solve123.dll. Now, move to:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Help
Choose Edit New String Value. For the name, type solver.hlp. For the value, type the complete path to the directory containing the Solver Helpfile, such as c:\lotus\123\solver\. Finally, choose Registry Exit to dismiss the Registry Editor.