you need to use ASCII, not the character directly... example;
Text in your PC could be:
Voy a escribir cualquier weá con acento, como:
árbol
cajón
información
blah blah...
replace the characters with the ascii code (octals):
Voy a escribir cualquier we\341 con acento, como:
\341rbol
caj\363n
informaci\363n
blah blah...
Unfortanetly, I lost my table, but here you have some of them:
á = \341
é =
í =
ó = \363
ú = \372
ñ =
try using values after 341 (á) and before 390.
Hope this help...