Yes, it's not that simple - otherwise I could have compiled it myself.

1) In CentOS OpenSSL rpm elliptic curves cryptography is disabled, so you have to build OpenSSL yourself.
2)  CentOS Boost-devel RPM is outdated and missing a lot of things, so you have to build Boost yourself too.
3) CentOS WxWidgets RPM is outdated so you have to build it yourself too. And its build requires more than 256 mb ram. Satoshi improved bitcoind so doesn't require wxWidgets any more, but I'm not sure whether that patch is in 0.3.7 or whatever sources you are building.