In the Entering special characters thread, I provided specific Unicode code tables for several Roman-based but badly-supported languages--so far, these include Esperanto, Irish, Gaelic, Welsh, Czech, Slovak and Polish. As someone (John?) mentioned, using Alt-X with those codes should convert them into the appropriate letter in Word, though I think the Alt-X codes may differ from Unicode in the lowest (< xFF) values. (Please correct me if I'm wrong on this.) Sadly, you'll have to look elsewhere for Unicode tables for the common special characters, since I only gave the HTML named "escapes" (character references) in mine.

Warning: Alt-X is a "greedy" algorithm, so if the preceding letter to the one you want happens to be in the range of A-F or a-f, or is a digit, you may have to pad your number with leading zeros (so you end up with four digits) to prevent the preceding character from being included in the code that Alt-X converts. You could also use a leading space, but then you'd have to back up to delete it. Typical Microsoft "design". Furthermore, Alt-X doesn't work with all Windows apps, only with Word and its kin.