[TYPO3-rte] Microdata in Typo3 v.4.5

[steffi p]

Hi there I'm new :)

I want to add microdata tags to my content. 
In Typo3 v.4.7 it is possible to do this by using the RTE, since this function is added to the core.

I'm running Typo3 4.5 with htmlArea RTE v2.1.5.
Is there a way for me to do this??

Thank you, best regards.