MTS only accepts sims3pack formats for lots, everything else must be converted to .package format. If your creations were made with the free tools available here then you already have them as .package files. If you have used TSRW for your creations then you can export them as sims3pack or .package format. If you are a downloader and would just like to convert sims3packs from elsewhere then you can use one of the first methods.
- When you install a Sims3Pack using the Launcher, it creates a .package file in My Documents/Electronic Arts/The Sims 3/DCBackup. They're all inscrutably named though, with a long string of letters and numbers. You can just rename your .package file from that folder (if you just installed it, sort the folder by date and it should be the last one).
Delphy's Sims3Pack Multi Install
- Or, use Delphy's Sims3Pack Multi Installer to extract the .package from the .sims3pack. (Especially useful if you have several .sims3pack files in a folder). You'll still have to rename it.
Echo's Lepid Llam Unpacker
- Or, use Echo's Lepid Llama unpacker [don't have current link] to do the same thing. You'll still have to rename it. It was built in Java, so Mac OSX users with Java 6 installed will be able to use it.