Sure thing mate, if you go into the Freelancer directory (when mod is activated), and then into the Data/Equipment folder - look for a file called "Market_Ships.ini"
You should be able to open this with a text editor - like notepad (don't use wordpad, or so i hear).
Once open, i think Florida is Li07_
If you do a search for Li07_ then you'll come to their declarations in the file. I think there are only a few places that sell ships, well, i mean about 6 - so your looking for a line which has something like (can't remember, FL not installed to look):
marketgood = shipname, 1,1,1,1,1,1
The numbers matter not at this point in time, i can't remember what the heck they are
The important thing is that you're looking for something where the shipname part looks vaguely millenium falcony. I dunno what it's called though, so good luck finding it.
Once you've found it, you want to copy that whole line (including the marketgood part) and then go to the top of the file, which should start with Br01_01_base
Here you'll find ships for sale - there should be three.
Put a semi colon infront of one of the entries, and then paste YOUR entry infront of it:
marketgood = blah blah,1,1,1,1,1 ; marketgood = blahblah,1,1,1,1
(where bit after the ; is the original entry).
Save file and load game - go to Planet New London, and hopefully it's for sale.
If there are LOTS of entries under Br01_01_base, then put a semi colon infront of ALL of them. Then paste your ship entry in above the lot (not infront of all of them, but above:
marketgood = milleniumfalcon,1,,1,1,1,11
;marketgood = existingship,1,1,1,1
;marketgood = existingship2,1,1,11,1 etc
Hope that works. Was once going to upgrade that ship-pack, never got around to it