As radzmar mentioned...if the instruction page wasn't created in LiveCycle Designer, you will either have to recreate it from scratch in Designer as the first page, or convert the static PDF to an image file, create a new page in Designer, add an image field, then import the PDF saved as an image. Remember to check the "embed option".
NOTE: When importing as an image, you will not get the same quality since you're dealing with image pixels vs vector lines/text...also, the file size is likely to increase. Thus, do yourself a favor and just recreate the in Designer which will be beneficial for future edits.