Relative searching is the simplest "caveman" method. Assuming no black magic is involved with the text storage (compression, unusual table patterns, etc.), searching for string patterns using a tool like WindHex is an easy way to identify which hex bytes correspond to which characters. Make sure, of course, that you use like cases - i.e., either ALL UPPERCASE or all lowercase (i.e. if you're looking for the string "House", it may be constructive to search for just "ouse").