Sender ID is the next generation SPF that hasn't happened yet. Basically nobody supports it and I feel confident in saying you'd be wasting your time. SPF is widely supported. DKIM is supported by most of the big guys, and any smaller ones that are serious about spam.
If you really want to setup Sender ID, it's just a series of SPF-like DNS records. The contents of the record are identical to SPF except the beginning, because the (possible multiple) SenderID record applies to different aspects of the e-mail depending on the contents of the record.
By example, if the record starts with:
spf2.0/mfrom, such as
spf2.0/mfrom mx -all then the "mx -all" part applies to the "From" header.
spf2.0/pra, such as
spf2.0/pra mx -all then it applies to the MAIL FROM: protocol negotiation.
You may also use both, such as
spf2.0/mfrom,pra mx -all.
Servers that support this should interpret it the same as "v=spf1 mx -all".