Hmm, you could try:
- Starting a new game paused,
- turning AI off - Iirc, the command is just 'AI',
- turning IC and IT on,
- building the stuff you rightfully deserve!,
- turning IC and IT off,
- then finally turning AI back on.
Alternately, have you considered creating a mod for it? You should only need to replace the OOB (Order Of Battle) for Finland, you it shouldn't be _too_ hard. ... but I will still wish you good luck with it.