What is the easiest way to downgrade g++?

I am running SuSE Linux 10.0 which ships with g++ 4.0.2. However, several of my programs that were working fine under 3.3.5 will not build under 4.0.2. I consistently get the following errors: /usr/include/c++/4.0.2/bits/sstream.tcc:112: error: expected unqualified-id before '(' token /usr/include/c++/4.0.2/bits/sstream.tcc:114: error: expected unqualified-id before '(' token I would like to downgrade my c++ environment to 3.3.x so I can get back to where I was (working!). What is the most direct/quickest way to get back where I was? I noticed that 3.3.x is not on the DVD. Thanks, Darrell