As already mentioned, a new version of WHDLoad which includes a special version for CD32 is due for release very soon (next week I believe).
You can burn a bootable Workbench CD with several installs in it, but you need to have as much free memory as possible.
AFAIK the WHDLoadCD32 will only work on a plain CD32 (i.e. no SX expansions supported), but will include some tools which should help in saving up some extra ram.
