so did you manage to get irssi working despite your appbrowser issues?
if not i guess you could manually install it by copying the extension, the dependency file (.dep), and the md5sum (.md5.txt) from the same directory on ibiblio to your tce/optional directory, also for any dependencies it lists in the .dep file.
'fraid i can't give you much help beyond that - not even sure that advice above won't have unholy side effects.
making extensions is fun and liberating. http://wiki.tinycorelinux.net/wiki:creating_extensions
is the page to read.
you'll need the compiletc extension to compile c/c++ programs. and the squashfs-tools-4.x.tcz to pack it up.
as well as any headers for the dependencies, usually packaged as somelibname-dev.tcz. for dwm you'll need X-org7.6-dev.tcz
the tce.installed script to load the wm is just how they're packaged around here, i guess. I suppose you could do it anyway you want
if it was just for private consumption. just letting you know in case you wanted to submit something to the repo. there'll be a .X.d folder
in your home folder you can put shell scripts that you want to run upon starting x there.
if that's too much, but you've got few spare bitcoins you'd like to trade, i'd be happy to package anything up for you.