!bang from outside

I think it's possible to make a link to litestep.exe with a !bang or a command appended.

Look here under command line parameters:
http://www.ls-universe.info/page.php?11

no sorry, i mean from litestep itself, from the main popup.

what do you mean by from outside of a theme?

well you popup.rc file isn't inside your theme right, it's in your personal folder and if i add for example !Amp_Play to it like this
*Popup "Play" !Amp_Play
that doesn't work although my current theme does have dynamp loaded.

But *Popup "Play" !amp_play should work... maybe you need to load dynamp before you load xpopup
theme.rc is no more special than popup.rc, they're all part of step.rc

I just tested it and it worked for me
I added
*Popup "Play" !amp_play to my popup.rc in the personal folder

uacmarine is correct.
SMS is also correct.
are you sure you dont have a typo in your config?
else try:
!Execute [!Bang]

Damn! I feel so dumb right now, i had the amp controls of in my theme, which also unloads dynamp, that's why it didn't work!

*Pep goes and shoots himself

;)

I guess you are mortal after all :D