How to dual boot windows 7 and centos on a compaq presario CQ56 laptiop

[Ernesty]

I can not for the life of me get the installation started on this computer I have made a seperate partition on the hard disk. But every time I go to install Fedora and centos to the computer it says there is not enough disk space. Ive tired to the shrink current system option and it gives me an error. Is there something in the format of the partition that is wrong? At this point I am lost. I will answer all question about the system I not sure what info you guys need. The current OS on the laptop is windows 7.

Thank you for your time I am really lost on this one. Last dual boot install was super easy.