Take out the arch liner (how else are you going to get to the bottom bolt?)
Remove the scuttle tray, radio and disconnect the aerial plug
Chop the old aerial cable where it runs next to the fresh air intake in the scuttle tray and remove the old aerial Fit the new aerial, tape the new aerial plug to the old aerial wire you just chopped
Pull the old aerial plug out thru the radio slot, eventually you'll feed the new wire thru without having to remove the dash

P.S. the glovebox will NOT come out unless you pull the dash forward, there just isnt enough room! Don't panic though its not as scary as you might think, only a few bolts & screws
