after registering got following message: while executing onClick in dmxSupersized_install.html,the following javascript error occured:
at line 1 of file ......users:Main:Library:Applicationa Support:dobereamweaver CSS:en_US:Configuration:sharedMXzone:Scripts:dmxinstaller104.js":getDocumentDOM:Argument number 1 is invalid.....I click OK then it says installing but the screen freezes...I have DWCSS5 mac ox 10.6.8

Hello Cynthia and welcome to DMXZone support forum.

Please clear your DW cache file.
The article bellow will help you to do it:

Clearing DW Cache

Thanks,
I downloaded it again for the third time today (2 yesterday) and today it installed without problems...I will take note on the cache if I get another issue in the future. Thanks