Change logos + bug fix - wp site

I need to change the logo on our website [login to view URL] The logo in the top left corner should be replaced by the logo enclosed here, and the logo at the bottom right (footer) should be replaced by the red logo (KnowIT) from here: [login to view URL] In addition there are som bugs in the source code - some references are wrong and pointing to my old domain "[login to view URL]" - it should point towards "[login to view URL]". This is the errors: Error: DD_roundies is not defined Sourcefile: [login to view URL] Line: 308 Error: $("#service-menu li").livequery is not a function Sourcefile: [login to view URL] Line: 323 You need to take a full backup of the site before you start changing anything, apart from that this should be a fairly straight forward job.