I have had the same trouble, however there is a work around for the 'open/save zip file' problem, once you have created the scorm zip file, open it with reload editor available from http://www.reload.ac.uk/. all you have to do is open the zip file, then use reloads zip button to re-zip it. Your package should then work on SLK. This doesn't fix the display answers problem when you click the review button, but if you are only using courselabs for quizes, then you are best using microsoft class server creation tool. this can be extracted from the full class server package.
I have had the same trouble, however there is a work around for the 'open/save zip file' problem, once you have created the scorm zip file, open it with reload editor available from http://www.reload.ac.uk/. all you have to do is open the zip file, then use reloads zip button to re-zip it. Your package should then work on SLK. This doesn't fix the display answers problem when you click the review button, but if you are only using courselabs for quizes, then you are best using microsoft class server creation tool. this can be extracted from the full class server package.