WP MU

[xrundel]

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 500 error, but on second work correctly.
Error:
test.myblog.com page isn't working
test.myblog.com is currently unable to handle this request
500

Other thing is option that could be extremely helpful for WP MU - additional field to setup upload directory by user choice.
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.
It would be great if it possible to add field in settings (and plugin functions) 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.