I dont think I have ever used a Windows (cmd) command line before. I use a Linux terminal all the time and I used to use command lines all the time on my Commodore 64 but I really dont think Ive ever used it in Windows.
I would a total tutorial on how to do that and I doubt anyone is going to take the time to explain it and tell me exactly what I need to type to get it installed and running. I guess I will have to go buy a "CMD for dummies" style book at barnes and Noble next time I am there.
Open the directory where your miner is.
In the directory window of the miner, hold shift, right click in the window, click open command window here.
minerd --url pool-url:port --userpass username.x:password --threads x
x for threads would be the amount of cores or threads you'd like to run. So if you have a quad core, and want to only use three cores, you'd use --threads 3. If you want to use 2, use --threads 2, so on so forth.
Also for windows, you can make a batch file.
Open the directory where your miner is, right click new txt file, hit ctrl-a, rename the file to cpuminer.bat . Click yes, you want to rename the file extension. Once the batch file is made, right click on it and click edit or open with notepad. Insert the following. but with you pool url & port, and your username password and how ever many cores/threads you like to use, replace the x with a number.
minerd --url pool-url:port --userpass username.1:password --threads x
Once the proper info is filled in the batch file, click save and close it.
Double click the batch file, it will start mining, also you may create a shortcut of the batch file to your desktop, by right clicking the batch file, create shortcut to desktop.
Hope it is clear enough to do, if not post back, and will help with what ever problem you're having.
Edit:
Also it is best to use mining proxy along with poolers cpuminer to take advantage of stratum protocol. If you want to do this hollar back, we'll go through the steps for that.