Opening an explorer window with access

My goal here is to get access to open a folder that is related
to the current displayed record. For example, if the
customer's last name is Smith, i want the folder
"//server01/jobphotos/Smith" to pop up when you click the Job
photos button.
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So far this is all I have for it...
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RetVal = Shell("explorer /e,/root,
//server01/jobphotos/Smith")
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This works on a one time basis, but i need it to be variable
so it bases the folder name on the last name of the contact
record. Any help would be greatly appriceated. Thanks
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