Forgive my ignorance if I am misunderstanding your plight and, again, I have zero familiarity with CentOS, but I was able to find an RPM for SQLite-2 on CentOS 4. The page title identifies it to be a “CentOS 4 FExtras SRPMS”. According to the description, it “contains static library and header files for developing applications using sqlite”, which is what is needed to get the mt-daapd nightlies to compile.
Your recent reply leaves me wondering if you do not understand that it is possible to have both SQLite-2 and SQLite-3 installed on the same machine, simultaneously, with no ill effect. The library and header files have different names.