If it's Toast Titanium 5.0, install it in 9.x, and then you can update it in X, to 5.1.4 then 5.2.1. With the updates (actually I think from 5.02 on), it becomes a Carbon application, and you can use it in both. The updates create a new Toast Titanium folder-you'll have to drag the extras from the original folder-Music, Photos, etc. into the new folder-otherwise the ones in new folder are empty. Keep only the latest Toast Extensions(OS9) folder. You'll need those extensions if you ever plan to burn in 9.x. Did you upgrade to 9.2.2 yet?
So I need to go back down to 9 again?? OK. So I install in 9, then update in 9. Then, go back to X and do a search for the app - and boot up? Does it move location by any chance? I don't plan to burn in 9 @ all actually... No need to.