Upgrading work manager 5.3 to 6.1 with out SMP 3.0

Hello Experts,

         As per the blogs and posts, work manager 6.0 is designed for SMP 2.3 and work manager 6.1 for SMP 3.0.Can we use work manager 6.1(with its additional features)without SMP 3.0 similar to work manager 5.3.Can we have standalone work manager 6.1 server or we need to install complete SMP 3.0 runtime .

Please suggest can we upgrade work manager 5.3 to 6.1 without SMP 3.0 to have standalone Agentry server for work manager 6.1(Like standalone server for work manager 5.3)

Thanks in advance

Thanks & Regards,

Sravanthi Polu