You did not specify what you needed to install.
Here is the service manual for the D610 - should assist you with taking the entire laptop apart - if needed.
http://support.dell.com/support/edocs/systems/latd610/en/sm_en/index.htm
If you want to replace the wireless NIC, you will need to look at the section marked "Mini PCI Card".
These are good directions - as long as you follow all of them.
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