I used TurboTax but TaxCut should be similar. In Schedule D line 1 column (a), I entered "See short-term sales" into the software, and entered the column (d) - (f) total figures from the attachment into the software. Likewise for Line 8 and long-term, sales. I left columns (b) - (c) empty, and TurboTax didn't complain. I put the attachments where D-1 would usually go.
This way, the tax software incorporates the figures properly in its computations. (The software allows "override," but I avoid that whenever possible.)
On the attachments, I put a page heading kind of like to what the software puts for attachments: name and social security number at the top, then "Schedule D, line 1" then "Short-term sales." Likewise for Line 8 and long- term, sales.
[Disclaimer: I'm not a tax pro, but am in the habit of paying taxes.]