There's a double-CD release called ``Then'' that contains the first two albums plus b-sides and other miscellanea. It has a ``demo'' version of Don't Let's Start. Lemme see how different it sounds. Hang on.

Edit: Nope. That's not it. It's got different instruments, and is significantly slower paced.

Edit again: Looks like there was a ``Single Mix'' of Don't Let's Start, though, which I don't have.

Yet Another Edit: Looks like that ``single mix'' comes from the Don't Let's Start EP, which is what contained We're The Replacements, amongst other things.