Autodesk Architectural Desktop 2007 & Prior

[#1]

I recall trying this out previously...I have 2009 at home however my work computer is 2004 AD.  I recall that I had to redraw what I had already done (in 2009) in order for us to use it on our 2004 system.  Is there a solution for this?  Forgot my laptop cord again...and need to work off home computer but won't if is just going to be a waste of time.  Thanks in advance!

[#2]

Nope, AEC content gets upgraded to ACA2009 version and is locked out forever from ADT2004. No fix, when DWG formats change so do the AEC content and no amount of saving back will fix it.