Having issues using the patcher

[EdmondX10A]

I've tried to patch Paper Mario (USA) multiple times and it doesn't seem to work. I've read the instructions on how to do it and went to the link too. It says it specifically asks for a Paper Mario rom with a format .z64 and I've tried looking for this specific format on multiple sites. Its always in the form of a zip file and when its unpacked the rom itself is in .n64 format which the rom patcher does not accept.
I even tried changing the extension type to .z64 and thought maybe it solves the my issue but no such luck.

The error keeps repeating "Unknown Format" and took a glance at the console window that google replies back to me with the error box.

Okay never mind, I found my issue... apparently it wasn't the paper mario rom file it was the mod files I downloaded, I tried again changing the extension to .z64 and it finally worked!!
These two ---> "PMMQ_1.5.1.1.mod" & "PMMQ_Jr._1.5.1.2.mod" files on the page was throwing the error (uploaded by Emperor_Thamz). I went to (Brotenko) profile and downloaded the files again in this format "Paper_Mario_Master_Quest_Jr_1.5.1.mod" & "Paper_Mario_Master_Quest_1.5.1.mod" and the patcher worked with the changed rom extension!

Now I don't understand what went wrong or what's the difference between the two files aside from the version numbers. But the short named mod files were throwing an unknown patch format error. Also I'm not sure if other people are having a similar issue as I did. So I'm just leaving this here for others.