Name AutoCorrect options in Tools | Options | General tab is supposed to do something along those lines, but those options are also infamous for corrupting the database, so most recommend not to use it.
Also, it does not alter references in code, nor subqueries (and more).
There are several tools available, some are commercial, as SpeedFerret, ReplaceWiz and Find and Replace, I haven't used any of them, but here is a discussion about some of them from CDMA (the newsgroup Comp-Databases-MS-Access)
http://groups.google.com/group/comp.databases.ms-access/browse_frm/thread/13fa0dcb6b30e2d3/, though I think it is fair to say that SpeedFerret hasn't been updated in the later years, and I don't think it works on 2003 versions, unless you also have the 2000 version on the same PC, or something like that.
A search also revelead there are freeware solutions out there. Here is one
http://www3.bc.sympatico.ca/starthere/findandreplace/
I don't use any of these products, and have no opinions on any of them. The one opinion I do have, is use a good naming convention from the start, then you won't need this
