@Ryslin - I'm not sure about UAC. I'm on admin account on XP 64 bit.
@SickPuppy - Normally I cannot patch, but somehow I don't know if I was lucky or did it right, I managed to patch without getting the invalid disc error.
I managed to install in the x86 Program Files but I had to download fresh copies of WA and HELS with their cracks. I'm not sure if this is an issue, but prior to this my WA and HELS were standalones.
However too, the saving time is between 1 hour to 1.5 hours and my save file is about 900 MB.
Thanks everyone!