all the codecs of the full version are included with the trial according to this: http://helpx.adobe.com/premiere-pro/kb/trial-version-limitations-premiere-pro.html
if you have an older premiere version installed, that could be an issue and others have reported a problem with certain codecs that need to be licensed. they will not work until premiere is activated.
hello, for what it is worth:
i have ppro 5.03 and i just installed the cs6 production suite trial onto the same computer
however, told it to install into c:\program files\adobe\cs6
(i made the cs6 folder)
everything installed fine, i applied all the current updates
and started a project
the avchd progressive and interlaced presets were there....