A VCD will not normally fit onto 1 CD as a CDR can only hold 79min movie on a 80min CDR. If you can burn to 99min CDR's then you can fit a 98min movie no problems.
But if you can only handle normal 80min CDR's then I would suggest you try EazyVCD ( www.eazyvcd.tk ). Its free and all software requiresd is installed when you install it. Select XVCD to fit it to one cdr, but expect a big drop in picture quality.
Have a read of this Tutorial for quality VCD conversions .. http://club.cdfreaks.com/showthread.php?s=&threadid=59422