Automate Fn key switch when opening Excel

So Microsoft released a free preview of Office for Mac, and it is pretty sweet.

One of my biggest problem when using Excel on a mac has always been that the most popular/frequent shortcut (F2 -> edit cell) was not available on macs (there was a default replacement, cmd-T I think, but not half as handy as F2).

Now F2 is here in the preview, great! But one still has to either press the Fn key, or switch the whole Fn key row (link from Apple page). Hence the question:

Is there a way to either:

• selectively only switch the F2 key, or


• switch the Fn key row automatically when opening Excel?