Shift knob assembly question

I have a 95 Nissan 240 and I can't figure out how to take out the shift knob. I want to replace the boot cuz its torn and the knob with a differnt one, but the problem is i cant figure out how to get it out. I dont wanna force it and break something. I tried to turn it, but it doesnt budge. Anyone know how to get it out? Your help is greatly appreciated. Thanks

http://www.automotiveforums.com/vbulletin/showthread.php?t=192868&highlight=shift+knob
http://www.automotiveforums.com/vbulletin/showthread.php?t=210441&highlight=shift+knob
http://www.automotiveforums.com/vbulletin/showthread.php?t=131599&highlight=shift+knob

hope this helps...

(the read lettering is cause i did a search)

if you do a search like me, you can find more than i did. there was a post a couple of days ago, or maybe a week with someone having the same problem. if you find it, it should be of some help. but i heard it's just on there REALLY tight.

thanks

twist it off lol