how do i install cab files on touchpro

[ucpro]

i'm an extreme noob, but i have my cdma touch pro with mightyrom on it. everytime i download a program ti ny computer, they all end up as a .xml with a bunch of extra files below it, and i extract it to the tp. when i click on the xml file on the tp it takes me to a blank page on the innternet, what am i doin wrong. i thought i was only supposed to see one file from the tutorials i looked @