I'm guessing he's right - an 85 Meg WMA file would be about that long in audio terms. Mid range compression gives about 1 minute per meg ish so that would be 85 mins ie around 1 hr 30 min.
As he says, he can't get that on an audio CD - was it a double album?
Never played with a single file for a whole album - does WMP show individual tracks - if so you should be able to burn from there - half the tracks to one disc, the others to another. Otherwise I guess a splitter as listed above. There seem to be more MP3 editters than for WMA but you can certainly get software to convert from WMA to MP3 then split maybe?