You can use the file manager. File -> file manager -> new file list - or use the fileman command. Enter the folder you want to search in. Slick will create a buffer with a list of all the files. Right click, select sort - select sort by size in the primary sort. Untick secondary sort then tick it again to allow secondary sort criteria (looks like a bug?). Use mouse click and drag, then press the delete key to delete files you don't want to search in. Then right click, global find - then tick "global" unless you want the search to find one at a time. Not sure which type of reg expression can be used - probably slickedit type. Once the list of files to search in is generated you can re-use it. You could probably write a macro to do some of this.