It sounds like you are looking for a so you can have all cars and tracks unlocked immediately, rather than progressing through the game. Wwf Smackdown Just Bring It Play Online
LFS does not use a single "savegame" file like other games. Instead, it uses .lyt (Layouts) , .set (Setups) , and .spr (Replays) . Your personal progress is stored in your data\misc folder and tied to your username. Life 152 Pc: Lost
Here is the breakdown of how to get a "better" experience with all content unlocked. You do not actually need to download a save file from a stranger to unlock everything. LFS has a built-in system where your progression is tied to your "LFS World" account statistics. However, for offline or host usage, you can edit your stats directly.
Since LFS is a serious simulation, there isn't a massive marketplace for "save games" like there is for story-driven games (like GTA or Need for Speed), but you have two main options to get what you want.