Renaming the Home folder.....

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DON'T!
http://docs.info.apple.com/article.html?path=Mac/10.6/en/8756.html

That a tough one to live with 😉
Try this kb article, if you want to pursue it.
http://support.apple.com/kb/HT1428
But be sure to backup your system first, TM or clone.



-mj

Don't let the earlier replies put you off; I've now done just that on two computers following the article referred to by macJack, with no problems whatever.

I did however take the precaution of backing up to an external drive beforehand in case of finger trouble.

Note that when creating the new user, you can use the same password, but the account name will have to be different. For instance if your full account name is John Smith, alter it slightly (to John J Smith for example) to create the new account. You can change it back after all's been checked and the old account deleted.