Pedrom installation and certificate problem - Page 1

Hi!
I try to send Pedrom 0.80 on my TI-89 with a USB cable and TI Connect 1.3.0.1. Before I have made with an hexadecimal editor a *.89u file from the pedrom89.tib file. TI connect recognize it and start the download but it give up at the end and said to me that the certificate is not valid.
I search in the Pedrom documentation and the only sentences I found about installation are :
"I don't want to explain how to send a non-certified TIB to a Ti-92+/Ti-89. It may be be dangerous, and you may dommage your calculator: unexperiment users may do dangerous things. You can nevertheless test PedroM on VTi. Nevertheless it works fine on my TI-92+ HW1, on some Ti-92+ HW2, on some Ti-89 HW2 and on some Ti-89 HW1. So I don't think it is dangerous."
How can I intall Pedrom on my caculator?
Thank you in advance.

You need to use the TIB Receiver.
You need to have AMS 2.05 or older on the calculator, so if your AMS is newer than that, ask TI for a copy of AMS 2.05 (or even 1.05, it doesn't really matter since you are going to overwrite it immediately afterwards ).