My 11 month old daughter has taken to cows milk really well. Here are a few things that I did to encourage her to try it. I added it to her rice cereal. I put a small amount in a cup and warmed it to room temperature. I told her she was a big girl and was having a "big girls" drink. I mixed a little formula with the cows milk to give her the taste. I personally wouldn't recommend adding milo or milk flavourings to sweeten the milk. There are toddler formulas on the market with the right levels of iron and minerals that you add to the cows milk. Remember sugar can damage young teeth. You could try a 50% mix of breast milk and 50% cows milk and gradually reduce the breast milk until she is drinking straight cows milk. Make it fun and don't force her to drink it, otherwhise you will just give her a negative feel about it.
I hope this helps a little. Goodluck, Maddys mum.