I don't really know how to tell you this. If the class cannot be redeclared, this is because the class has already been initiated once already. I suggest you find out where the line
class storepickup
exists within your store code, and go from there.
Using the Developer's Toolkit in the admin, under tools, paste "class storepickup", without the "s, into the last textbox, and select Catalog from the dropdown, and tehn click search. Please paste here EXACTLY what the return fines.
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