Well, take a look to my gallery then, there's a video of me pumping (Poor quality)
Don't go too far with the pressure (if has a gauge, don't surpass the 5 mmHG mark), your first sessions (during the first three-four weeks) can only last like 10 minutes. Make one session per day during the first two weeks, and then increase to two sessions in the third week...
If your pump doesn't have a gauge, no problem, just pump a little more when you get an erection inside the tube; and a last commentary..
Are you having pain? STOP IMMEDIATLY.
If you want a healthy/bigger cock, follow the instructions or take a look at the
Free Penis Enlargement , and in the member section (you need to get a registration) there's a great subforum about it! If you want an useless and nasty looking cock , overdo it.