Is there something like the old ghostview in xsi 2.0.1, like in softimage 3dCUSanostol
unfortunately, no
There is a script in the xsi>script>animation section that you can use with xsi2.
what did the ghost view do?
ghost is like onionskin. For example your are at frame 10, but yuo can also, see let's say 5 frames before and after. its really a good thing.
sanostol