Relative path for external livepreview swf

In our project we are using components, and we have to use livepreviews for those.

We don't want to embed all the livepreview swf to the fla, because of the size of it, but because the fla files could be on different location per PC (local svn repository), the absolute path for the swf could be different as well.

How can we set relative oath for external livepreview swf files? When I try to set a relative path, the Animate is change automatically to absolute one