Without actually contributing any useful information, let me just say that this is one of the more impressive failure I've seen. He managed to exceed the limit by a considerable amount in all three rated categories, and by a factor of 2x to 3x in both HC and NO! I am truly humbled by his sociopathic disregard for life on this planet.
Seriously, though. The numbers are somewhat confusing. HC (hydrocarbons) is unburnt fuel and is generally symbolic of an overly rich mixture. NO (oxides of nitrogen) are typically by-products of excessively high temperature or pressure in the chamber during the combustion event, and are usually indicative of an overly lean mixture. So a simplistic interpretation here is that your brother's car is both too rich and too lean at the exact same time.
Ok, so what can be done here...
High NO is often caused by a malfunctioning EGR system. So clean and inspect that.
I'm thinking that the high HC might
be a by-product of some funky injectors. If he's got one injector that's flowing considerably more (or less) than the others, then the engine will over-compensate the "good" injectors to achieve an acceptable average AFR, and thus the engine will be both rich and lean.
I would recommend that he put some time and elbow grease into the EGR system, and some money into a new cat and O2 sensor(s)- it goes without saying that these are automatically suspect on an OBD-I vehicle of this age.
If the car still blows bad numbers, then the injectors might benefit from a visit to the Sexy Nurse Clinic