Multi site addition

I use your great plugin for few years. Particularly it great for export/import blogs between domains. Now I tried it for WP Multi site installation and there are few problems.
First – sometimes it required few attempts for make plugin work correctly because at first attempt it return error, but on second work correctly.

Other thing is option that could be extremely helpful for WP MU – field to setup upload directory. Let me explain. In MU installation even if I setup upload directory in wp-config all images uploads to /images/site/1/ which is local for each individual blog. But if it possible to add field in settings (and function in plugin) where user may specify path for images in root outside MU directories like home/myblogs/public_html/images/my_pictures – that would be priceless for multiple blogs as they can use same pictures across network instead of multiple uploads of the same pictures.

Thank you for your consideration.