Upon hitting the "ESC" key, the most common cause of CTD with YAP2 and Vista is that you have not disabled the water shaders in the VietnamSea_DATAINI you are using.

Open the Terrain folder. Open the VietnamSEA folder. Locate the VietnamSea_DATAINI you are using. Locate these entries and change them to read:

[NormalTextureMaterial]
UseEffectShader=FALSE //TRUE

[WaterTextureMaterial]
UseEffectShader=FALSE //TRUE

I tried that it still did not work, So i updated to the october 09 patch and that worked.

I can't save the moded missions from yapv2 on my other partition; so I don't have any hope of doing the YAPv2 missions; on that partition. Current WOV v100809 is running fine.

3rd times the Charm I got every thing working and I didnt have to do any ini changes all I did was roll back to 9.4 ATI drvrs and reinstall WOV on E; and WOV YAPV2 on F;

now everything is working even unlimited in the WOV 1009v and High water in WOV YAPv2 83006v edit I started getting CTD's on pressing esc again so I went and edited the vietnamesea_data.ini "

Open the Terrain folder. Open the VietnamSEA folder. Locate the VietnamSea_DATAINI you are using. Locate these entries and change them to read:

[NormalTextureMaterial]
UseEffectShader=FALSE //TRUE

[WaterTextureMaterial]
UseEffectShader=FALSE //TRUE

This did work for me.