When I installed the toolkit for 6.0 and 6.1, it got put into \vi.lib\addons. Under that, you should have a SQL folder with Access, Intrface, and Menu folders under that. That was with version 3 of the toolkit. If you don't have the files anywhere, you should try reinstalling the toolkit. They are not part of the normal LabVIEW distribution so if you recently upgraded or did a reinstall of LabVIEW, you wil have to install the toolkit separately.