Sorry guys I have a few questions. I have the latest OSX and Limwire. I have have problems with files downloaded from Limwire. I can't play any of the AVI files. I have tried to download programs and extension and everything and they still aren't playable. Another problem is that I also noticed a lot of playable files are all the same file with different name. Are they spams or something is wrong with limewire setting?

We normally recommend this player VLC - (click on link). Else get Perion though VLC will play all video & audio files you find on gnutella network. If VLC cannot play it then it's probably a dud file.

And yes, be wary of spam. Some tips: Movie download issues (click on blue link) (2nd last post has information on best video formats.) and Virus thread: Typical virus spam file sizes - Make a note of them (click on blue link to see).

BTW no need to double-post, your post will be seen.

both VLC and Mplayer do not work on those same files...

Then the files are probably no good. There's a lot of spam out there.
What are the file sizes of the files that will not play & are they audio or video?
And what are the file extensions of them?

they are mostly AVI. Movie files. over 10mb

avi are usually ok. But the size is typical spam. 11.5 MB & 12.1 MB are typical spam. Did you see those samples in the link I gave above. They're not the only ones but the most common.

Unless they are music video clips, most videos under 100 MB are porn & such spammed. Typical movie video should be 500 MB or larger. TV episode perhaps 200 MB .. varies.