MINE IS NOT ALL THAT SLOW LOADING. PERHAPS YOU HAVE OVERLOADED THE ACAD.LSP ROUTINE WITH A BUNCH OF CUSTOM LISP FILES, ETC. IF SO, TAKE ALL OF THAT MESS OUT OF THE START-UP SUITE. YOU CAN LOAD THEM ON DEMAND AS YOU NEED THEM. (My dang cap lock really sucks on this pooter!!)
Do not strip anything or you will have a mess. maybe you can trade your LDD for a plain Jane ACAD 2005, but ALL the stuff you will loose!! On mine, MAP does not load unless I use the MAP icon, so it's not an issue. Maybe you can reload it with the "custom configuration" options and select only those elements you need ?