file browser instructions; xmodem up/download; diz caching

1. Don't like the phrasing style, trying to get rid of it (QUit, etc.)
2. on python2.6, you cannot use ``{}``, only ``{0}``.  I haven't checked our python2.6 compatibility in a while, but last i checked it should work.

```
>>> '{}'.format(1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: zero length field name in format
```