R help - Nov 2010 - haplotype and epistasis analysis using 3 or more SNPs?

Dear Mme/Mr.

Hope you are doing well. I am doing some genetic analysis using The R software
and I have difficulties to find how I can perform an Interaction/epistasis
analysis using 3 or more SNPs (=markers) ? (In the instructive manual, there is
only an interaction/epistasis analysis with 2 markers).

In addition can you please inform me how  I can perform Haplotype analysis and
if there is an option for the haplotype interaction?

Thanks in advance and best regards,

Fathalli ferid MD.