btw the power cable from the ps to the mobo has a 20 port part and a 4 port part and my mobo has a 24 port part and a 4 port part does the 4 port go into the other 4 port or fill the rest of the 24 port?
First: RTFM
Second: If you have questions RTFM again
Third: RTFM once more
If you did infact RTFM you would already know the answer to all the questions you have asked.
The answer to your question is that the 20+4 pin ATX connector goes into the 24pin slot you have there. Another connector called the P4 connector, which is square and consists of 2 yellow and 2 black wires goes into the P4 connector on your mobo. THe P4 connector is separate from the ATX conntector.
The other thing to note is that it's very difficult to plug in a PSU the wrong way, and if you experiment a little no damage will be done unless you turn the computer on with something hooked up incorrectly.