Using a macro to edit from selection

I'm making an Index more useful. Where there are entries like

Australia's unusual mammals in Tasmania

I'm duplicating the entries then putting the word I want at the front, to give eg

mammals : Australia's unusual in Tasmania and
Tasmania : Australia's unusual mammals in

Can I get something like this to run, when I've selected the word I want first? :

Sub PutWordFirst()

SendKeys "{Control}({X})"
SendKeys "{UP}" 'moves insertion point to start of cell
SendKeys "{Control}({V})"
SendKeys " : "

End Sub

Perhaps MS Word would be better.

That's neat, thanks.

Must try Word, though!