O.K. I know its a easy question, but once I join meshes Ctrl+J, How can I seperate them once again. I used to know the key, but somehow can not remember. I did make an attempt to find the answer in the search, but mabey my query was to broad. I am also in a hurry, I want to test out an Idea before I have to shut down. So i am looking for some quick help. (So please Pooba, don’t give me a tongue lashing)…
Thanks, The NDN…
As long as you have not removed the doubles after joining, you can select one of the vertices of the mesh in editmode, press l, and then press p…to seperate.
Thanks QWERT, appreciate it, let me go give my idea a try now.
The NDN…
Well, it did not work, my idea that is, back to the drawing board!!! 
The NDN…
You can’t “unseperate” an object that has already been joined. You ahve to select all the vertices of that object and then hit p and get them off of there.
And if i’m not mistaken this has nothing to do with the game engine, so it hsould go into the Blender general folder %|
Pooba
You know Pooba, if you would of read the previous posts, you would of seen that someone had already answered the question for me, but I know you just could not resist posting a off-handed reply. As far as posting that question here, I was working on a game, and thats the answer I needed, so I posted here. It had to do with my game. If you want to make some stupid remark, about me posting a legitimate question here, you first better take a look at yourself. Many, Many of your replies to others are off handed , borderline rude, just because they ask a question “YOU” think they should know. And talking about abusing the forums, you are one of the biggest offenders, with your constant, childish, bickering back and forth with others. I would find it hard for anyone to deny what I said, not to be true. So to sum it up I would like to say “Shut your pie hole”. And in the future when I do post a question, I would appreciate it if you just would not reply, I would rather get help from someone who is a little less abbrasive and a little more mature. I would suggest, you just walk away from this one, but I know that would be impossible for you, you will have to say something snyde, and of course, get the last word in. In my case, I am done with this string, and certainly will not reply to anything you have to say, I wont even look here anymore, so whatever you might reply, I will never see it. Have a good day 
The NDN, Very tired of that Crap!!!
I’m sorry, i do realize the some of my more recent posts have been kind of mean and sarcastic, but that’s a lot of how i’ve been feeling lately. I did not read the entiredy of QWERT’s responce and missed the pressing L thing (which, by the way, does work and is a very useful thing) and thus assumed that all you had done was opened the mesh in editmode and just selected a single vertice and hit P. I didn’t really know about that cool feature, i apologize. 
However, though i don’t really think it matters THAT much, this should go into the blender general forum. I’ve noticed that the blender game engine people are kinda off in their own world and only post in this forum and not in any others.
Again, i assumed, and when you assume, you make an Ass out of U and ME
And I also don’t like people who haven’t tried anything to figure out the problem. Stuff like this i can understand, and, knowing you, you probably know enough of blender to use this command 
. But some people try to go way ahead of themselves and try some advanced concept without trying to learn the stuff by themselves.
Pooba
JEEEEEEZ, Man, Why you have to post such a NICE Reply, Now I am feeling regretful of my Post. As far as the “Mature” remark, that was out of line, I certainly appologize. And yes I did lie when I said I was not going to read or Reply to the post (that would of been immpossible). Any way, I have had a BAAAAAD! last couple of weeks, mabey thats why I came back so Hard. ( I realize I am not the only one who has tough days, weeks, months) I would like to recant what I said about not replying to my posts, you have been a help to me in the past, and I always appreciate those times when you are stuck forever, and a blender head is good enough to reply with a answer. Well I goto say I feel better after letting of some steam, But worse for directing towards mabey to someone who did not deserve it. Anyway I hope I did not cause any friction that will carry on. I use this Forum sometimes as an escape, my own little place, that no one else knows about, so I want to keep everything smooth sailing. SO, please except my humble appology, for posting such a hard nosed reply…
The NDN
No problem man, glad that’s settled up 8)
Pooba
Can’t…we all…just…get…ALONG ?