10_100_1000 Mbps tri-mode ethernet MAC

Hi, Jon Gao. I'm trying to use your IP on a project but i'm facing some problems. Firstly i was using altera tse mac and all my design has been made to match the 32bit alignment feature. I thought about changing it on the tx_FF, but i'm not sure about the CRC_gen module. Is it possible to change it on your MAC on a simple way?

Thank you a lot.