Hello :)
Most of the Maxis buildings doesn't fit in my cities. I already have a blocker available on SimMars Beta 3, so no ugly brown tenements and terrible gothic skyscrapers. But still some of those buildings are very beautiful and fits nicely in my cities, so i tried to just customize their lots to making them available into the game. I made the beginning with the CO$$$ lots. Most of them are ugly, but some of them contain beautiful buildings. So i customize the lots with the nice buildings, to make them appear in the game. However i still can't see them in the game &mmm
Is there a way to block not all Maxis lots, but only those we want to block?
Yes. However, there are many ways to block a building, and I don't know how it was done in SimMars. If the Blocker is a separate file within SimMars then you could open it up in Reader. It will either have a bunch of building exemplars or even more lot exemplars. You would have to find the difference between the Maxis Originals and the SimMars exemplars.
If you don't feel like digging through, you could delete the file, and use this: BSC Blocker (http://sc4devotion.com/csxlex/lex_filedesc.php?lotGET=897). This blocker changes each Maxis Lot to grow at stage 255, which will never happen. Unblocking them would be a process of finding what lot you want in the LE, and then bringing it's stage down to the proper level.
If neither of these things appeal to you, you can always use PIMX to make new building/lots with the Maxis Buildings.