I just checked the ftp server for EMC and there is a new build dated June-5-1999 on the site. Don't know what it fixes, but I am downloading it right now and will report back later.
Just had a few minutes to install the new build. I don't know all the fixes or if they affect you servo guys, but this version has fixed the problem with the DEFAULT_VELOCITY setting. What you enter in this parameter in the [TRAJ] section of your ini file is now the feed rate that Xemc initializes with. Also, the MAX_VELOCITY setting in the [TRAJ] section is working as the feed rate you get for your "G0" rapid moves.