Did you know you can modify your game files to start with custom lots in the lot bin? Did you know you can add your favorite lots to the program files and you'll never have to import them ever again? I sure didn't. Here's how.
Part 1: Freshen Up That Lot!
Locate the lot you want to freshen up. If it's in your Documents > LotCatalog, it'll be named something like cx_00000001.package. [Hint: you can use CleanInstaller to browse your LotCatalog with pictures!]
Clean it up using LotCleaner and LotCompressor (and Magic Wand, if you want). Here's a tutorial. Do NOT skip this step, or you risk contaminating future save files with old sim references.
Make it a spiffy new picture. Personally I like to lump my similar lots together with a similar title/street name. And I color-code using CatherineTCJD's color-coding format. If you want to match me, you can download my template psd here.
Open your lot in Simpe and replace that old preview. Click 'jpg/png image'. Right click the property > Replace. Change file format to 'all files' to see your image. Click either 'yes' or 'no' on the 'resource changed' popup (it doesn't matter--one updates the image preview immediately, the other doesn't). Click save.
Part 2: Relocation Time! *MAIN LOT BIN*
You cleaned up your lot, right? No sim references left? Don't skip this step or you risk messing up future hoods. Clean up that lot!
Select your lot file and rename it to the cx_00000000.package format. You can use any numbers but it must be in that format and have 8 digits. The number denotes the order so get creative with your categories. (ex: lots cx_00000100-150: modern houses / cx_00000200-250: beachy, etc.). You can use any bulk renamer to rename files in order without having to manually number each one.
Pick an Expansion for your files. Mansion and Garden comes first in the lot bin, Base Game last. The expansion you select will denote the location of your lots within the catalog. The file location is the same in every expansion, so you can even spread your lots around for max organization.
Move your cx_#.package lot file to Program Files > The Sims 2 > [expansion of your choice (ex. Nightlife)] > TSData > Res > UserData > LotCatalog. You will already see some files here. These are the maxis lots that fill the lot bin every new game. You can delete them if you really want to, or just change the extension to something else to make them go away. (Catherine has a backup if you need them back.)
Done! Now your custom lots will prefill the lot bin every time you generate a new The Sims 2 save file in your documents!
This will not pre-fill existing games. If you want to put your new clean lots into your current file, rename your main The Sims 2 save file (in your Documents folder) something else. Launch Sims 2 so it regenerates a clean copy. Create a new Hood, let the game load, and check out the LotCatalog. It will be now filled with your brand-new lots. Copy them over to your main file's LotCatalog. [Check your main LotCatalog in game to make sure you won't be deleting/overwriting anything you want to keep (make a backup just in case!) Check it again with CleanInstaller. Do not delete/overwrite occupied homes! And delete your old and crusty lots in game if you want to be extra safe.]
Part 3: Relocation Time... 2! *SPECIALTY LOT BIN*
You cleaned up your lot, right? No sim references left? Don't skip this step or you risk messing up future hoods. Clean up that lot.
We will now populate the second tab in the lot catalog, the Specialty lot bin that holds Hotels and Apartments. You can put whatever you want in here; it doesn't have to be hotels or apts. You can move lots from the main catalog to this one, if you want. These lots do not appear in the LotCatalog of your main save file, in case you try to look for them there later. They only exist in the program files.
Rename your files. Unlike the previous lots, you can name these lots anything you want, as long as it ends in _Permanent.package. stinky_Permanent.package is perfectly fine. Name it something descriptive.
Pick an Expansion for your files. You can put them in any Expansion folder, but personally I keep my apts in Apartment Life to stay organized.
Move your files. Take your stinky_Permanent.package and move it to Program Files > The Sims 2 > [expansion of your choice (ex. Nightlife)] > TSData > Res > LotTemplates. You'll see some other files here already. These are blank lots and hotels/apts (if you're in Apt Life or Bon Voyage). Don't touch the blank lots, but you can remove the hotels/apartments if you don't want them. (You can move them to the main lot bin by renaming the files to the cx_# format and moving to the location in part 2). You can open them in SimPe to check what they are, but Catherine has a visual list here.
Done! These lots will appear in the Specialty lot bin every time you boot up the game, even in your current saved game.
Have fun and enjoy organizing!
[PS: did you know you can not only delete or relocate existing bin lots, but replace them with better, and cooler lots by simply overwriting the existing cx_0000000 files in your UserData > LotCatalog folders? Catherine has a visual guide which file is which, if you want to reinvent them all. The lot bin is your oyster!]
credits: CatherineTCJD for the Lot Refresh project that made me learn this. Bluerubberbear for the majority of the lots in my thumbnails and the lot in the psd file. Plumbtales for the other lots in the thumbnails and for the beautiful lot makeovers that I replaced maxis's community lots with.