Hello I am new to S.E.T.I. I have downloaded the screensaver.

I have been scanning/decoding signals for 36mins.My source is Arecibo Radio
Observatory. I have read information on the website (below)

http://setiathome.ssl.berkeley.edu

The information says that i should only let the program run for 5 mins
although so far i have let it run over 35mins.

Please can someone answer my frustrated questions:

How long does it take to finish?
Can I pause the program?
Will this consumme all of my computers hard drive space?

Thanks in advance.