Ideally after you install the distro, you have all the softwares that you want to use. But the world is not perfect. I know today you can install softwares easily in Linux. Let's say...... apt-get...., swaret...... the gui installer like OpenOffice or Mozilla. It is easy...

Even with source, you can easily install the software. Just.....
./configure
make
su
make install

But some softwares are hell
Let's say that for some reason you cannot or don't want to install from gui installer or apt-get. You have to do it by sources. Unfortunately this damn software need you to read the README then ask you to install the damn libraries..... Hmmm, did I tell you that this software depend on more than 10 libraries. Well, this damn software ask you to edit some files... it ask you AGAIN to configure it some way...... Must with certain prefix...... This damn software depend on some weird libraries. Oh, you have to googling to look for the information...... ask in forum.... but hey..... you still cann't get it work......

Ok, what software ( for you and in your condition with your distro ) is the most difficult to install in Linux/Unix system??????

I use Slackware 9.1. And for some reason if I don't get from Patrick I compile from source.....

These are the hell softwares to install in Linux:
Number one........... gdesklets
2. gnucash
3. evolution

Note: I know in some distro, installing gnucash is a piece of cake. But have you try to install gnucash from sources? Or gcc froum sources? Just remember some softwares are difficult to install in certain distro and easy to install in some distro...... I am in Slackware environment.....

Ok, I spend hours to tweak and install softwares in my desktop..... Time to do serious things now.... Enjoy.....