How to check it's working: the Tortoise is available
A couple of things to check if it doesn't show up
1) must be copied into the lib directory.
2) small basic must be off while copying
3) you will need to restart small basic
3) the versions must match (the latest version 22 works with SmallBasic 9) [the nature of .net doesn't allow for working across signed .dll's]
hope this helps.