Apps :: .DSL files??
Using DSL's Desktop icons to install software, it first tells you what it is, what it does, then asks you where to put the files - usually in /tmp. This GUI/script downloads the software plus an MD5 file for validation, it then installs the software.
After a few seconds or minutes, all the GUI panels disapear, and your software is ready to run.
I did this with GTK2 (then did the same to un-install it) and GCC, which worked without any tweaks.
Which icon? I forgot, but it's not the PDF icon, or FoxFire.
original here.