I have set this up and found it only works if there is a disks in the PC CD-ROM drive . . .
ccxstream -l 192.168.1.2 -S mymusic=d:\stream\music -S videos=d:\stream\videos -S pictures=d:\stream\pictures -S mypccd=e:\
<share>
<name>Network (XBMSP) PC CD</name>
<url>xbmsp://192.168.1.2/mypccd</url>
<cachesize>256</cachesize>
</share>
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* when sharing CD-ROM drive all shares only work if disk is present in the CD-ROM drive
Hope this helps