I got this RPC error when installing and used the program below to fix it on Windows 98. I'd recommend backing up the files that it replaces in your /Windows/System folder, just in case:

asycfilt.dll
oleaut32.dll
olepro32.dll
stdole2.tlb

When installing on Windows 98 you receive an "RPC Stub" Error.

To solve this issue, you will need to download a patch from Microsoft located here:
http://download.microsoft.com/downlo...S/mcrepair.exe