For those trying to add the Paypal link to the Logo sidebox I finally discovered how to do it!

Go to your defines file (logo_sidebox_defines.php) where you define LOGO_SIDEBOX_LINK

Now you will notice your when you define the link you use a single quote to enclose the link
define('LOGO_SIDEBOX_LINK', 'http://your_link.com/');

The problem is that the paypal link also has single quotes in it, so as soon as the sidebox sees the second single quote, it assumes the define is closed.

So, to include single quotes in your define, PHP code requires you to put a backslash "\" before each single quote. This way it "ignores" that single quote as being the end of the define

So your define will go from
'#" onclick="javascript:window.open
('https://www.paypal.com/us/cgi-bin/webscr?cmd=xpt/Marketing/popup/OLCWhatIsPayPal-outside','olcwhatispaypal','toolbar=no,
location=no, directories=no, status=no, menubar=no, scrollbars=yes, resizable=yes, width=400, height=350');'

to

'#" onclick="javascript:window.open(\'https://www.paypal.com/us/cgi-bin/webscr?cmd=xpt/Marketing/popup/OLCWhatIsPayPal-outside\',\'olcwhatispaypal\',\'toolbar=no,location=no, directories=no, status=no, menubar=no, scrollbars=yes, resizable=yes, width=400, height=350\');'

Note that this is just for the Paypal href LINK ONLY. You will still need a defined image for the sidebox and the image sitting in my template\image directory.

Hope this helps people!