Amigabasic
Jesse,
Although I've never tried it, the utility PopCLI (which I believe is PD) should
work for you to get a CLI from AmigaBasic. Once you invoke it, you just hit
left Amiga-ESC (or C= escape, if your keyboard is like mine) and a CLI is
invoked. (I got my copy on the Lattice distribution disks, so I don't know if
it's available in the DL's).
Sorry, but I can't help on the search/replace problem. I've been intentionally
avoiding AmigaBasic programming in an effort to enhance my C programming.
David