oracle 10.2 from service.sap rar file extraction

hi friends

i would like to know how to extarct the .rar files which i got from the sap web site i got 5 file one is exe and remining 4 are .rar

i have downloaded the oracle 64 bit windows software now i want to install the oracle how to extract that and where can i find out the .exe file to install the 64 bit oracle

suggest me how to do this

regards

raja