Support for RNIF2.0 and RNIF1.0

Does webMethods 6.0 support both RNIF 2.0 & RNIF 1.0 ? RNIF2.0 is not backward compatible with RNIF 1.0. Does this mean we need to have different instances of webMethods integration Server supporting the two RNIF versions(1.0, 2.0)?

webMethods RosettaNet adapters 4.0 and on