How do I install sablotron?

I need the sablotron PHP extension so I can process my XML using XSLT.

I figured that this kind of thing would have to be installed deeper than my ftp client could take me, so I’ve plumbed the depths of internet wretchery and found out how to connect to the shell. Unfortunately, now I don’t know how to get the sablotron files on to the server, let alone install them and all that.

I’ve read a few guides, and picked up how to download stuff and what I think is install things, (make make install?) but they are all for compiling PHP with sablotron, and I don’t think compiling is what I need to do here. Right?

Any help greatly appreciated