That's a tricky one. You might try charting it out - use Vs for knits and -s for purls. The beginning of the original rows are seed stitch, but after you add those 5 sts, they'd no longer be at the edge. So you'd have to make the first 2 or 3 sts in seed stitch, then do the others in the k1 p4 (or k3 p2) part of the pattern. Are you there yet? If not, by the time you are, it may be easier to see how to keep to the pattern by looking at your previous rows, just that the original edge sts will no longer be seed stitch - that shifts to the new beginning of the rows.
sue- knitting heretic