1: customapache: end-of-life software. Apache 1.3, php 4, frontpage. Do not use. No support.
2: custombuild 1.1: older software. Apache 2.x, php 4, 5, or both in cli and/or suphp. Defaults to php 5.2
3: custombuild 1.2: * Recommended. simlar to 1.1, newer default versions. Apache 2.x, php 5, 6, or both in cli and/or suphp. Defaults to php 5.3
4: custombuild 2.0 ALPHA: Not yet recommended, still in testing. Apache 2.4, mod_ruid2, php 5.4. Can be set to use php-FPM. Experts only. Requires pre-release binaries.