Compressing 30 minute HD video to 60MB

Hello all,

I have a number of lectures I shot ranging from 20-40 minutes. I edited them in Final Cut and the client needs them in 60MB WMV files. I have no problem converting to WMV but I am having a heap of trouble getting an acceptable quality video that fits these size paramaters. I can deliver some of the longer videos in sections. So far I have tried lowering the frame rate to 15fps, shrinking the size to a smaller 16:9 ratio, lowering the bit rate, and switching audio to a mono track. I am exporting using Mpeg streamclip with flip4mac plug in. Any suggestions would be greatly appreciated.