[TYPO3-dev] Replacement for loadTCA

[Tom Peters]

Hello,
I'm trying to build a new Content Extension in Typo3 6.2.
I got trouble to update the TCA[tt_content][types][pluginname][showitem] without using the deprecated "loadTCA".
If the item TCA[tt_content][types][pluginname] is set I'm able to use "addToAllTCAtypes('tt_content', $showitemtext, 'pluginname')".
Is there a good way to set TCA[tt_content][types][pluginname] without using "loadTCA"?
Yours sincerely
Tom Peters