Missing in-Call Transfer Feature Codes

Using FreePBX 2.8.1

I have several missing Features codes under the Core section that I am in need of and dont really want to program them by hand.

Specifically I am missing the feature codes for

In-Call Asterisk Attended Transfer
In-Call Asterisk Blind Transfer

I am pretty sure there are more missing but those are the 2 critical ones that I am currently in need of. I have ran into this in the past with Voicemail feature codes. The solution there was to edit the voicemail module XML to allow me to uninstall it. Then I reistalled it and the feature codes showed up. My concern here is that these feature codes are normally listed under Core and I dont know what the ramifications would be if I did a similar solution there.

Any help would be greatly appreciated.