Okay. How would you consolidate those states then?
Make a stabler Mexico. If you avoid the creation of Santa Anna's Seven Laws, which changed Mexico from a Federal Republic to Central one, Tlaxcala and Puebla remain together, as do Sinaloa and Sonora; Colima and Aguas Calientes are never created (one is part of Jalisco the other of Zacatecas), and after loosing Texas Coahuila would likely be annexed by Nuevo Leon.
Later on the states of Hidalgo and Morelos would never be created (easier if you change the capital of the State of Mexico to Pachuca rather than the centralist, next-to-Mexico-City Toluca).
The creation of Guerrero makes some sense since it is made up of the coast of Mexico State and Puebla. And that way you also avoid having Acapulco in the same state that sorrounds Mexico City.
Baja California could stay as a single state. Although this division technically makes some sense with Mexico's current border with the US. Northern Baja is a buffer to deal with the border, while Baja Sur (which remained quite unpopulated till recently) deals mostly tourists and fisheries.
Yucatan could remain united if it never seceded or got its shit together when it did. Once again the separation of Quitana Roo from the rest makes sense but you can keep Campeche and Yucatan together.
I think this covers all of them. Once again this need a stabler Mexico if you are trying to balkanize it just have the major cities/states expand their borders and annex the ones around them.
Likely you would see six states emerge more or less. Rio Bravo (centered in Monterey or Laredo), Jalisco (centered in Guadalajara), Puebla/Tlaxcala, Mexico proper (taking most of central Mexico), Yucatan (as a single state or divided into two), and depending how things go Sonora (by William Walker) and/or Oaxaca could be a likely sixth and seventh.
Think you mean the Central American Republic?
No, Chiapas was part of Guatelama from the beginning, with or without the Central American Republic. Mexico regained it in two different treaties (first San Cristobal then the Sonocusco Region) after the break up of the Central American Union.