Corsa-B.uk - Vauxhall, Opel and Holden Corsa B Owners Club

Brought a new CD stereo so I am looking to replace my factory fitted front door speakers to get the full use out of it. How easy are they to replace? Is there rewiring or adapters needed to be used to install the new ones?

Say if I was to get these..
http://cgi.ebay.co.uk/Vauxhall-Corsa-B- ... 2182wt_1017

Are they just a straight swap?
Thanks.

yeah they are just a straight swap. unscrew the old ones, unclip them and do the opposite to put the new ones in.