1. First, Use the serials to install
Serials
Adobe CS5 Master Collection
1325-0549-2240-0071-3409-1342
1325-0702-3693-1544-9166-3515
1325-0178-1927-9019-0123-2254
1325-0150-1163-7532-1626-3430
1325-0365-5929-6118-8817-8422
1325-0621-9125-0765-3648-0614
*Do not run program after install yet!
2. Next, Add the bottom ip addresses to /private/etc/hosts (hidden)
(Use shift-cmd-g and type /private/etc)
127.0.0.1 http://www.wip3.adobe.com
127.0.0.1 http://www.wip4.adobe.com
127.0.0.1 wwis-dubc1-vip60.adobe.com
If you can't modify the 'hosts' file, copy it to desktop first then modify.
When finished, copy it back to its original place. (you need authentication)