yes, but there is a few added lines to those markers. i don't have the rpgmap off hand as i quit playing and coding, but if you search the rpgmap5.mis for merchant3 and copy the code and change it around, you have a new merchant. the shopmenu or shoplist or shop (dunno, can't remember) is what controls what the banker sells, all those numbers are item codes in the game. to get a complete item list, run the loop through the invenlist echoing the number of the item and the item name. yea it sounds hard but its easy, i wrote the function for it in about 30 seconds. as i don't have any code sitting around me anymore..... maybe particle will post a function or something similar (maybe the list already generated).
for bankers, just go search the file for a banker, change the names and positions, and your done.
-EI-