ok you, ajax, sir, are probably not in the right directory.
1) i hope youre doing this as root? type sudo gainroot in the terminal
2) type
ls

that is, the letter L in lowercase followed by an s.
and tell me what the results are
if you can see your psfreedom-enable.sh and psfreedom-disable.sh files, then type ./psfreedom-enable.sh
however, i assume your problem is you arent in the right directory.
to change directories, you have to type
cd/root

this takes you into the root folder, which, if you followed post#1, is where your files will be. to check, simply type
ls

again. if they are there, you may NOW type
./psfreedom-enable.sh
to make it run. if it works, there will be nothing strange or abnormal printed to the screen, the terminal will just go to a new line. if it doesnt work, youll get an error.

and you, naz_ak47 probably dont have wget. not sure if it can be installed through the app manager or not...do a search for it. if it shows up, happy days. if not, just do a quick google on installing wget to n900. sorry, i dont know the command to get it myself.