Can only record 30 seconds from a streaming movie

[biggie_mac]

Long story short, I have an http streaming url (can't disclose it unfortunately) that always loads only 30 seconds. Basically it's a url like http://....file.wmv?rar=00645D92-000...0-fed6619bfd1d (param probably for timestamp) which when loaded will play for 30 seconds and then stop (it's basically a preview for a pay per view website). Now actually the entire wmv is loaded because I can see the entire length and I can also jump to different positions. So to workaround this and see the entire movie, I made a small html file with a javascript controller that jumps to position (+1 second) every 30 second. So when it get's to second 29, it jumps to 30, when it gets to 59 to 60, etc. This way, after 29 seconds of streaming, another 29 seconds are loaded and I can avoid the movie stopping. Now I can see the entire movie this way, but can't seem to save it locally. I've tried Jaksta streaming but what it does it only saves the first! 29 seconds each time the movie receives another buffer. I've also tried other recording applications but they all seem to save only the first 29 seconds. Besides using desktop records, isn't there any other way to save the streams?

Thanks in advance