I had a bit of trouble with this component, but the trouble was because my site is not standard. Here is what I did to correct the problems. I opened the zip file and without extracting the file I opened the admin.multi.php, gacl.class.php and joomla.php one at a time in PSPedit and did a search and replace for jos_ and then JOS_ with the case sensative feature active and relaced these with the prefixes used in my database (ex: pop_ and POP_). This solved the first problem. The next problem had to do with not being able to connect to the database. I opened the control panel on my ISP's server and selected the Remote Databses Icon in the Database section of the control panel and added the IP address of my main site, so that my main site can write to my remote sites database. For the server name required on my main site I used the IP address of the remote site (the one I am wriing to). That was all that was reqired. As for the developers, I suggest that you change the jos_ prefixes to the variable prefixes used trough-out joomla in future updates. Great job guys!!!
Thanks