get a csf editor, extract generals .csf and find the units(or other ToolTip label, and change it.
wheres generals.csf?(what folder?)
well first you are gong to have to get a .big extractor (i got mine from generalsfiles.com, so you may have to find it from another location... ill try to attact it here) and then you will have to extract generals.csf from English.big (on generals) or EnglishZH.big (on zero hour) and edit it to your liking!
install the second file (BigPOP.zip) first, and then if you have zero hour, the first file (BP_v072.zip) is for zh files!