How to use/edit commands
Have a look at the Toolbar Editing tutorial video to get yourself up to speed.
1. Go to collections
[ul][li]You can have buttons which go to individual collections in one click. For example, this will go to the Find Results collection:
go "coll://Find Results"
[li]You can have a button which takes you to the list of collections (the list being shown in the file display, not on the menu). This is in the Go menu by default so you shouldn't have to create it. It's also available in the pre-made list of commands Settings -> Customize / Commands / Go: Go To File Collections). For completeness, the command that it runs is this:
[u]2.Copy this to collection X[/u]
[ul][li]The command that Greg suggested is Copy COLLLIST. This can be used on a toolbar or context menu. When you select a file and then click on the button a sub-menu will appear listing all of your collections, allowing you to click on a collection to add the selected files to it.
[li]You can also make commands which add the selected files to a specific collection, without any submenu. This will add things to the Find Results collection:
Copy TO="coll://Find Results"
[u]3. Remove this from collection.[/u]
Sounds like you've got that one already.
[u]Speed up searches?[/u]
What kind of search are you doing? Which search terms are you using? For example, if you search based on the contents of files it will obviously be slower than just searching by filename because every byte of every file has to be read.
Opus should read directories and decide if filenames match at the same speed as any other program which does real-time searching (i.e. that doesn't used cached search indexes generated overnight, like Google Desktop Search etc. use).
How many results are returned for the search?
When you compared the speed to other programs, did you run their searches right after you ran Opus's? That isn't a fair test because the filesystem caches some or all of the directory information for a while. If you run the same search twice in Opus it's often instant the second time for the same reason.