I purchased a single T-6 from the Reno Expansion in the MP. After reviewing/downloading several liveries, it seems that I'm unable to change the livery of this particular T-6 (Six Cat) unless I purchase the entire expansion package. Could someone confirm or offer a workaround such that I might be able to use another livery for this AC? I've downloaded several, but they don't show up in the livery menu. Thank you in advance..

I think you need the base model to use liveries.  That's at least what I've found with the L39.  I bought a few different ones but no 3rd party repaints work for me

Thank you, Ryan. I suspected that after reading that the entire expansion pack  was necessary. Thank you for confirming.