First, Middle And Last Name

I have a list if names, some with a middle initial and some without, that are all in one field. eg George P Wingrove or Ada Wingrove. Can I run a query that will seperate the name into two or three fields? I have tried the following in a query, but not being very successful. FirstName:Left([Name],InStr(1,[Name]," ")-1), MiddleInitialTrim(Mid([Name],InStr(1,[Name]," ")+1,InStr(InStr (1, [Name], " ")+1,[Name]," ")-InStr(1,[Name]," "))) and LastName:IIf(InStr(InStr([Name]," ")+1,[Names]," ") <>0, Right([name],Len([name])-InStr(InStr([Name]," ")+1,[Name]," ")),Right([Name],Len([Name])-InStr([Name]," ")))
Unfortunately, it puts #Error if there is no middle initial. Any way round this problem?

David