Converting OLE Automation in Delphi2 to COM Automation in Delphi3, 4 or 5

I have an OLE Server application written in Delphi2. I need to convert
server to COM Automation in Delphi 3, 4 or 5.
Is there a way to create a Type Libraries from an existing Delphi2 unit?
What steps
should I be following? Any Dos and Don'ts?

I would appreciate any help.

Thanks in advance