Well, for buffers, I'll speed things up with a SEARCH subfunction to return the offset of a given byte or sequence of bytes in a memory buffer starting at a given offset (for multiple searches).
I don't know if this is the search he's referring to, though.
As for including the file manager in the internal.xml, I'd like to do that, but there will be other considerations as well. I need to add cropping to images, so a single source image can be used to hold all the icons.
I am also looking into expressions (using () for numerical values - see notes in ActionScriptReadMe.txt) and access of memory buffers as variables with array indices.