Itunes Ringtones For Blackberry

Videos and ringtonges for Blackberry Pearl?

Ok so,
I have one of those little memory chip things so my phone can hold extra “media” (i.e. ringtones, pictures, videos) and i burned my cd’s from my iTunes into an MP3 format. Then, I put the Cd onto my computer harddrive and they popped up in that little box where you can play them or rename them and all that. I got all the songs onto my phone, but when I go to use it as a ringtone (it works) but it’s the whole song, from beginning to end. I just want one portion of the song on my phone. Is there any way that I can format the song to be just one part of the song from my cd’s to my phone? BTW, the songs come up in the program Window’s Media Player when I insert the CD. Also, how do I get videos on my phone from my computer using that little smart chip?
The reason I don’t just buy ringtones is bc I don’t have the Blackberry package, so I can’t access the internet on my phone.
THANK YOU! TEN POINTS TO BEST ANSWER AND I WILL STAR YOUR NEXT QUESTION!

There is a program where you can make your own ringtones and download them onto your computer called Tonethis. You can download the program at pinstack.com Its easy to use. From that site you can also download free ringtones onto your computerand upload them onto your memory card or by using the media manager.

If you wanna download pre-made tones, I also use this site: http://crackberry.com/free-ringtones

The BB only allows certian videos to play on your phone. I go to this site to download free videos. I add them to my memory card and they play on my BB. http://www.mv3gp.com/3gp_videos_hits37.html

How to make ringtones in iTunes 9.2 for iPhone 4