It is very easy guys, trust me. Make some efforts!
Step 1; Upload the portfolio to your ISSUU account (*useful tips: ISSUU only allowed until 100mb per document. The smaller the file, the faster it will be uploaded. Reduce the file size using Adobe Acrobat).
Step 2; Make sure you open the portfolio using Chrome web browser (*I am more familiar with Chrome, different web browser has different setting). While on the same portfolio page, go to Chrome setting (find it on top right of your window, below close button) – click tools – click view source
Step 3; Another window will pop out showing lines of code. Go to Chrome setting – click find – write documentId in the search box. Copy the highlighted Id . Example: 140127195738-5eacb494c0b797ef6dfa35b905887786
Step 4; Log in to your WordPress account and go to Unit 22 blog and create new post. Copy this whole template into the blank space: (*find the template in the comment section below. For some reasons I can’t write it here because WordPress will read it as a code)
Step 5; Replace the documentId into the template in the NUMBER-HERE section.
Step 6; Click preview and voila! (don’t forget to publish it though!)
*I learned it from here. Full credits goes to the web owner: http://wpbtips.wordpress.com/2011/01/18/inserting-issuu-docs/