We provide a VCF to PED tool to convert from VCF to PLINK PED format. This tool has documentation for both the web interface and the Perl script.
An example Perl command to run the script would be:
perl vcf_to_ped_converter.pl -vcf ftp://ftp.1000genomes.ebi.ac.uk/vol1/ftp/release/20110521/ALL.chr13.phase1_integrated_calls.20101123.snps_indels_svs.genotypes.vcf.gz
-sample_panel_file ftp://ftp.1000genomes.ebi.ac.uk/vol1/ftp/release/20110521/phase1_integrated_calls.20101123.ALL.sample_panel
-region 13:32889611-32973805 -population GBR -population FIN