Use and ftp to just drag and drop the folder where you would like it (ex) root /blog... etc. Obviously your path is just incorrect. Unless I'm wrong I thought there was an install folder.. so maybe it should be blogs/install/index.php or install.php.. sorry I forget the file name. Hopefully someone else can be of more help...

There are tons of free Ftp clients out there... I 'm sure anyone here can recommend a good one.

you totally saved me hours and hours... thanks again!