Sony Ericsson W810i help!?

No, the W810i doesn't play WMAs, but it can play MP3s with 32 Kbps (it's the minimum bitrate you can encode an MP3 to play on it). Besides, I don't know why you want your music files in WMA that it's a heavier format than AAC and MP3, try to rip your songs in AAC to MP3 using the Disc2Phone software that comes with the phone, use it in 32 Kbps and you will save a lot of space in your Memory Stick. If doesn't work get the Switch Audio File Conversion Software from the link a href="http://www.nch.com.au/switch/index.html" rel="nofollow"http://www.nch.com.au/switch/index.html/a that can convert among a lot of audio files including AAC, M4a, MP3 and WMA.