I was obliged to upgrade to Acrobat X Pro from my former 8.1.0 version through a change from Windows XP to Windows 7 64-bit platform. The feature I used most often in the older version was PDF Package whereby MS Office files could be converted and combined as PDFs but with access to the individual files via thumbnails. Generally, the combined file size was smaller than the sum of the parts. Portfolio in Acrobat X is fine, but unfortunately multiplies up the coimbined file size several hundred percent, which is not good for emailing to size-limited mail boxes. Is there a compression feature I've yet to discover in Portfolio, or a more 'compressive' alternative to Portfolio in Acrobat X Pro?
You can optimize your individual files prior to assembling the Portfolio (File > Save As > Optimized PDF), but you cannot create a legacy "package" in Acrobat 9 or X.To support the larger average file sizes that Acrobat users typically work with, Acrobat X includes the new SendNow Online service in the Share pane. Using this service (a subscription offering from Adobe) you can upload large files to a temporary server and email your recipients the download link, so there is no concern over mailbox limits or blocked attachments. You can also of course use the similar online file hosting services provided by a multitude of vendors, a lot of which are free to use, being funded by in-page ads.