Replace antenna mast?

[lindajane]

Hi,

My antenna failed to go down far enough and got bent in a car wash....
So I ordered a new mast. My mechanic said he'd put it in for $20.
Now If I can do it, I'd rather. I saw a youtube how to video and it
called to open part of the trunk. Is there anything tricky about putting
in a new mast?...It has the steel part, and a smooth white cord.
Thanks!
Lindajane