ok, now that i know how to install pedrom onto my TI-89; how do you send files from the computer via the black ti link cable to the TI-89?

Just send files as if you were in the "main window" on AMS. You can have problems using Ti-Connect. It's best to use TI GL or TiLP (if errors occurs, you can reduce the transfert rate).
I know there where link problems with Alpha versions of PedRom, but I don't know about the 0.80Beta (If I remember well, problems are now solved).
(Sorry for my english, due to the time (7:44am) writing in an other language than french is a bit hard).

If you get an error box, just press enter in the calculator, and send the program again. It should now work fine (I don't understand why you always have an error the first time you send a file). After this, you can send as many files as you want.