Caravan to Hermosillo

[Dalillama]

A new FLGS recently opened near my home, but currently all of their on site games are D&D 4.x and D&D Next, whatever the deuce that is. I am hoping to find/recruit some GURPS players for a game there, in the service of which I am adapting Caravan to Ein Arris to a weird west setting (Low-grade supernatural effect, probably dinosaurs; I am inspired by the Big Lizzie adventure currently on e23, but my present budget doesn't stretch to luxuries, so I'm adapting the free adventure for now). I am seeking advice/suggestions for doing so, as well as sharing my work for those who may wish to use it. For those giving advice, please bear in mind that the only 4e books I own are the 2 parts of the Basic Set, although I do have most of the relevant 3e books (Old West, High-Tech, etc).
Here's what I have so far:
The year is 1876, TL is 5
ETA: CFs will be Anglo, Latin, Continental, Chinese, Shoshone/Comanche, Dine(Navajo and Apache), Tarahumara (Copper Canyon and surrounding areas), Ute/Paiute, Pueblo, and Pima. There are many other Native CFs, but none of them will be relevant to this adventure or near-future ones, so I'm not worrying overmuch about defining them right now.

I'm replacing the Broadsword skill with Guns (pistol) and replacing Bow with Guns (Rifle), changing the weapons appropriately. All references to riding camels are removed, all references to pack camels are replaced with mules. Use Animal Handling (Horses) or Teamster (Horses and Mules), at -1 due to contrariness, as well as an additional -1 familiarity penalty to Animal Handling for those who haven't worked with them before (Teamster automatically includes familiarity with mules, as any drover will have worked with them).
Languages
Lantrai=English
Shadrassa=Spanish
Catho=French

NPCs
I notice that no CFs appear on the NPC writeups in the adventure, and I'm not certain what CFs I'm using yet either. Suggestions are welcome.
Halmaro the Red= Colonel Harold Rufus, a New Orleans shipping magnate branching out into the cattle trade. His daughter Ciara is marrying the son of the Governor of Sonora, and he has chosen to combine the trip with his first major cattle drive, which he's overseeing in person.

Katsaya=Catalina Rufus, Harold's wife, a cousin of the late Emperor Maximilian of Mexico (Since the character is listed as coming from a third country that isn't where the caravan starts or ends, she is French originally, and periodically claims loyalty to that nation.)

Falvaro=Francoise Picquery, a French Creole with many contacts in the Rio Grande area

Tsorvano=Teodoro Acosta, story unchanged

Karhan the Bandit Cheif= Carlos Banderas, story unchanged

Kira=Ciara Rufus, story unchanged

Geography
Khedris=New Orleans, Louisiana, U.S.

The PCs will go in advance to
Tatsori:=Nuevo Laredo, Texas, U.S.,


Aghnara=Batopilas, Chihuahua, Mexico


Bandothru River: San Pedro River
Ein Arris=Hermosillo, Sonora, Republic of Mexico

Events:
The tavern scene (p 6) is unchanged, except that no false rings of invisibility are on offer; snake oil, treasure maps, and belligerent drunks are unchanged. The name of the bar is the Mississippi Queen.
Chapter 4
Sandstorm (p 9): Replace with a rainstorm and flash flood.
Encounter table ( p.10): The riders are not wearing cloaks.

Chapter 5 : Nuevo Laredo (p 11)
Day 1: Assorted low-quality guns and knives replace the swords. Tea is replaced with coffee. Otherwise unchanged.

Day 4: The race is a horse race, not camels.

The members of the caravan will be taking steamboats up the Rio Grande from here to Ciudad Juarez. Francoise will arrange for passage if the party arrives on time. The steamboats are a chance to use any tavern encounters that weren't used earlier, and offers the same recreations. This trip will take 3-4 days. In Ciudad Juarex, the caravan will meet up with Harold's cattle herd, being driven West to graze. Cowboys and drovers will have to earn their keep from here on.
Chapter 6 (p 12)
The wedding is between the son of a prosperous Spanish rancher and the daughter of the headman of the local Tarahumara village. The gift animal is a prize stud bull and pair of Merino sheep. The bull is extremely rambunctious and ill tempered. (-2 to Animal Handling rolls to deal with him)

Chapter 7 (p 13):
This mission involves heading North into Arizona.

Chapter 8 (p 13):
The first group of tax collectors works for the local Don. The second group works for Porfiro Diaz. Depending on political sympathies, either group (or both) could be considered legitimate tax collectors or bandits. The stockade (p 14) is located in Cananea, Sonora, and in the hands of Diaz loyalists. Broadsword skill on fighter templates becomes Guns (Pistol) (E), bow becomes Guns (Rifle) (E), and all skill levels go up by 1. Broadswords are replaced with S&W Model 3 revolvers, Bows are replaced with the Spencer M1860 Carbine

Chapter 12 (p. 18) Haggling in Tucson
Besides the stockade, all other references to Ayun take place in Tucson, Arizona.

Chapter 13 (p 19):
The Abbey is the Mission San Pedro y San Pablo del Tubutama, in Tubutuma, Sonora. The nuns are Catholic.

Riana's Story (p. 22):
due to local custom not allowing polygyny, Riana is the product of a love affair conducted immediately prior to a political marriage to Catalina. Otherwise unchanged.