Typing in the accented keys once for doing the config is no problem, I can simply ssh in from my desktop computer and use its keyboard. The question comes more from how to configure keyhelper to generate \"dead\" keys. For example, with my CustomInput config I can type the quote (\') key followed by A and get á, or ~ followed by n to get ñ. If I type a quote followed by anything other than a vowel, or a tilde followed by anything but an N, I get the normal behavior (i.e., \'x).
Also, how do I get keyhelper to generate arbitrary characters? All I\'ve seen is the <map key=\"...\"> tag, but that only works for characters generated with the standard Zaurus keyboard, not for other characters (such as accents).