Note: Devel Live CD boots in the same way as 4MLinux does (this was described here).
1) Select Installer from the Devel Menu:
2) Confirm the installation by choosing 'y' and pressing Enter:
Now you have the minimum required to compile programs written in C and C++. A big collection of additional development software has been installed, too (enough to compile all programs, which are included in basic version of 4MLinux).
3) You can also download additional "alien" (i.e. not 4MLinux native) packages:
All the file managers, which are included in Devel Live CD (Midnight Commander, Path Finder, and X File Explorer), are able to open rpm, deb, and other archives. Please refer to this post for details.