I have sussed out the change required to get the weblogger bookmarklet to work with the PC version of IE5. All that is required is a change in the method of getting the selected text. To be specific, changing:

var ds = document.getSelection ();
to
var ds = document.selection.createRange().text;

I have added the PC version to the Weblogger bookmarklet page.

Please let me know if there are any other problems.