I have DSL 4.2.2 running....
For wine: Open the MyDSL folder on the desktop then select the UNC button, scroll down to wine and select the download option.
For gcc, again use the MyDSL folder, select the system button, scroll down to gcc + libs to install gcc.
For apt-get, right click somewhere on the desktop to activate the menu, select "Apps" -> "Tools" -> "Enable Apt"
That should do what you need. If you have an earlier version of DSL it will use a similar procedure.
Let me know if this works for you.