Is it possible to use Zilminer alongside with Phoenixminer mining ETH?
yes it is
try with this 3 bat files located in the ZIL folder, where the ZIL miner is
start.bat
C:\MINER\Phoenixminer\start.bat
startZIL.bat
zilminer.exe --pow-start stop.bat --pow-end start.bat --pow-end-at-startup -P zil://0xblablablaYourZILaddress.nameRig@207.180.192.43:4202
stop.bat
taskkill /f /im PhoenixMiner.exe