Nero 6 and Allok converter

good day
i want to make a vcd through Nero6 but it give me unsupported format message for my desire files. infact i have converted some flv to mpeg1( vcd format) using Allok video converter.
please advice me if TMPEGEnc can convert flv to mpeg1 i have latest version called “TMPGEnc Authoring Works v4.0.0.9” but it has nothing to do with conversion.
i used Imtoo and other softwares but they r slow and having lip synch problem but Allok is free from these flaws. any advice will be helpful