The introduction section is the shortest. Start out with a Cover Letter and a Title Page. Keep the Cover Letter brief: simply write a personal introduction to explain who you are and provide your contact information. The Title Page should be exactly what it sounds like: a title that introduces your proposal and provides a clear message about the ideas and/or services you are pitching. Some examples might be "Proposal to Create a New Executive Assistant Position", "Proposed Temporary Services to Benefit the Stuart Corporation", "Executive Search Services Proposed for Jameson Company", or "Suggested Candidates for the Vice President Position".
Of course, the reason why you would like your memories to be mounted to a scrapbook instead of a photo album, is because you would like it to be special as much as possible. When you create a scrapbook of your own, you do not have limitations in adding as much creativity as you want, unlike photo albums, you are entailed to use only the spaces that are allotted for pictures. And since photo albums are ready made, it's difficult to make a personal touch for your own preference.