I'm at the step of installation of 4 Enterprise Linux Release 4 Update 8 Media Pack for x86 (32 bit) files. Downloaded and extracted V16746-01 and V16748-01 successfully to a Linux folder under Ora_Download.
However, I'm having problem extracting V16745-01 and V16747-01 after downloading through Download Manager "Error: Invalid compressed data to expand (inflate) the file). Uninstalled and reinstalled few times in past 5 days. I can't proceed further. Will u please help? Is there any other website I can download these files from? I am running Windows XP? Eberything upto this step has gone smoothly.

File looks corrupted. I dont know what to suggest. Try downloading outside Download Manager. If the file is corrupted at Oracle's end then hopefully Oracle will resolve it soon.