'This patch will only update version 1.3 to version 1.5"

[SpawnOfEbil]

I'm trying to reinstall RTW and EB on my PC because I suddenly had a nostalgic urge to play EB again, and I'd quite like to try to EB for BI installer. However, every time I try to patch my clean install of BI with patch 1.6, I get the error message in the title. I'm running Vista 64 bit (I know, a bit of a nightmare for old games) and I've tried copying both the RTW folders into Program Files and Program Files (x86), both of which have no effect.

Does anyone have any ideas?

[MarcusAureliusAntoninus]

What version of BI do you have? Some versions of BI come already patched to v1.6...