I realise this post is 3 months old but here goes anyway. I made a script in Autohotkey to solve this kind of problem. I use it several times a day in XP and Vista. Mostly I use TLB to navigate to the folder I want and then right click on it in the TLB toolbar and select 'Send to Dialog Window'. Details below, and screen shots here <!-- m --><a class="postlink" href="http://docs.google.com/Doc?id=dccck29f_8hr2nj3dz">http://docs.google.com/Doc?id=dccck29f_8hr2nj3dz</a><!-- m -->.
Quote:Source: "New Context Menu Item Puts Any Folder Into a Dialog Window".
Website: <!-- m --><a class="postlink" href="http://www.autohotkey.com/forum/viewtopic.php?t=40764&highlight=">http://www.autohotkey.com/forum/viewtop ... highlight=</a><!-- m -->.
"In dialogue windows like ‘Save’ or ‘Save As’ in XP and Vista, or ‘Insert Picture from File’ in Word you have to navigate a folder tree to get to the folder you want. If you have the folder visible already, say in Windows Explorer or on the desktop, it’s annoying that you can’t quickly transfer its path into the window. This script provides a solution."