[nsp] MPLS/LSP question

[Hank Nussbacher]

Consider the following topology:
R1-R2-R3
Where R1,R2 are MPLS routers. R3 doesn't run MPLS.

Can I built an LSP that ended in R3 without supporting MPLS? According to 
RFC3031 it seem that it is possible:
"The definition of LSP allows for the LSP Egress to be a node which
does not support MPLS; in this case the penultimate node in the LSP
is the Proxy Egress."

However, I am not sure, if it indeed supported defacto, and if yes, please 
send sample IOS config.

Thanks,
Hank