You will be able to reload your memory card and still have the new car by going back to the main menu and selecting Extras; this enables auto save.
A nice feature is that Alien Escape has an auto save feature, which is useful in those overpowering alien encounters.
One draw back of SSX On Tour is the random error messages you will get, but using the game's "auto-save" feature will lessen the blow when you have to restart.
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