The easiest solution is to Stuff or Zip your files and name it something simple like:

MacBanner.sit

Use only alphanumeric filenames. Filenames containing any symbols, other than letters or numbers, can cause problems when uploaded to our server. Please do not use spaces, quotation marks, or any of the following characters when naming your files:

~ ` ! @ # $ % ^ & * ( ) + = {}[ ] \| : ; " ' < > , ? /

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Alternatively you may upload files to our idisk account at Apple.

Note: This is a blind upload and you must inform your sales representative that you sent it to the idisk and provide them with file name(s).

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Or you may wish to try sending using www.yousendit.com, it's free and registration is quick.