By 'the wiz' I'm assuming you're talking about the 'SQL Server Import and Export Wizard'. (I'm also pretty new so I don't understand most questions, much less most answers, but I think I get this one). If so couldn't you take the spreadsheet, or a copy of it, delete the columns you don't want imported and then use the wizard?
I've always found the ability to do what I need with it and I'm only on SQL Server 2000 (not sure how other versions differ).
Edit: In fact I'm looking at it now and I seem to be able to choose which columns I want to map to which rows in an existing table. On the 'Select Source Tables and Views' screen I check the datasheet I'm using, select the 'Destination' then click the 'Edit...' button. From there you can choose the Excel column and the table column to map it to.